Home / 12,132,336.80-18,198,505.20-9,421,987.70

Finding the Fourth Proportional to 12,132,336.80, 18,198,505.20 and 9,421,987.70

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Solution

The fourth proportional to 12,132,336.80, 18,198,505.20 and 9,421,987.70 is: 14,132,981.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,132,336.80 : 18,198,505.20 = 9,421,987.70 : x
  2. Step 2: Convert to fraction form
    12,132,336.80/18,198,505.20 = 9,421,987.70/x
  3. Step 3: Cross multiply
    12,132,336.80x = 18,198,505.20 × 9,421,987.70
  4. Step 4: Simplify right side
    12,132,336.80x = 171,466,092,152,786.03
  5. Step 5: Solve for x
    x = 171,466,092,152,786.03/12,132,336.80
  6. Step 6: Final answer
    x = 14,132,981.55

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.