Home / 12,147.07-18,220.61-9,377.78

Finding the Fourth Proportional to 12,147.07, 18,220.61 and 9,377.78

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Solution

The fourth proportional to 12,147.07, 18,220.61 and 9,377.78 is: 14,066.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,147.07 : 18,220.61 = 9,377.78 : x
  2. Step 2: Convert to fraction form
    12,147.07/18,220.61 = 9,377.78/x
  3. Step 3: Cross multiply
    12,147.07x = 18,220.61 × 9,377.78
  4. Step 4: Simplify right side
    12,147.07x = 170,868,870.71
  5. Step 5: Solve for x
    x = 170,868,870.71/12,147.07
  6. Step 6: Final answer
    x = 14,066.68

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Double scale
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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.