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Finding the Fourth Proportional to 19,640.28, 29,420.28 and 16,342.76

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Solution

The fourth proportional to 19,640.28, 29,420.28 and 16,342.76 is: 24,480.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,640.28 : 29,420.28 = 16,342.76 : x
  2. Step 2: Convert to fraction form
    19,640.28/29,420.28 = 16,342.76/x
  3. Step 3: Cross multiply
    19,640.28x = 29,420.28 × 16,342.76
  4. Step 4: Simplify right side
    19,640.28x = 480,808,575.17
  5. Step 5: Solve for x
    x = 480,808,575.17/19,640.28
  6. Step 6: Final answer
    x = 24,480.74

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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.