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Finding the Fourth Proportional to 19,417.20, 29,077.20 and 18,542.40

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Solution

The fourth proportional to 19,417.20, 29,077.20 and 18,542.40 is: 27,767.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,417.20 : 29,077.20 = 18,542.40 : x
  2. Step 2: Convert to fraction form
    19,417.20/29,077.20 = 18,542.40/x
  3. Step 3: Cross multiply
    19,417.20x = 29,077.20 × 18,542.40
  4. Step 4: Simplify right side
    19,417.20x = 539,161,073.28
  5. Step 5: Solve for x
    x = 539,161,073.28/19,417.20
  6. Step 6: Final answer
    x = 27,767.19

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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.