Home / 19,331.40-28,997.10-13,187.40

Finding the Fourth Proportional to 19,331.40, 28,997.10 and 13,187.40

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Solution

The fourth proportional to 19,331.40, 28,997.10 and 13,187.40 is: 19,781.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,331.40 : 28,997.10 = 13,187.40 : x
  2. Step 2: Convert to fraction form
    19,331.40/28,997.10 = 13,187.40/x
  3. Step 3: Cross multiply
    19,331.40x = 28,997.10 × 13,187.40
  4. Step 4: Simplify right side
    19,331.40x = 382,396,356.54
  5. Step 5: Solve for x
    x = 382,396,356.54/19,331.40
  6. Step 6: Final answer
    x = 19,781.10

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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.