Home / 19,330.20-28,995.30-12,331.80

Finding the Fourth Proportional to 19,330.20, 28,995.30 and 12,331.80

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Solution

The fourth proportional to 19,330.20, 28,995.30 and 12,331.80 is: 18,497.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,330.20 : 28,995.30 = 12,331.80 : x
  2. Step 2: Convert to fraction form
    19,330.20/28,995.30 = 12,331.80/x
  3. Step 3: Cross multiply
    19,330.20x = 28,995.30 × 12,331.80
  4. Step 4: Simplify right side
    19,330.20x = 357,564,240.54
  5. Step 5: Solve for x
    x = 357,564,240.54/19,330.20
  6. Step 6: Final answer
    x = 18,497.70

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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.