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Finding the Fourth Proportional to 19,454.40, 29,138.40 and 16,862.40

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Solution

The fourth proportional to 19,454.40, 29,138.40 and 16,862.40 is: 25,256.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,454.40 : 29,138.40 = 16,862.40 : x
  2. Step 2: Convert to fraction form
    19,454.40/29,138.40 = 16,862.40/x
  3. Step 3: Cross multiply
    19,454.40x = 29,138.40 × 16,862.40
  4. Step 4: Simplify right side
    19,454.40x = 491,343,356.16
  5. Step 5: Solve for x
    x = 491,343,356.16/19,454.40
  6. Step 6: Final answer
    x = 25,256.16

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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.