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Finding the Fourth Proportional to 42,655.80, 63,983.70 and 13,073.40

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Solution

The fourth proportional to 42,655.80, 63,983.70 and 13,073.40 is: 19,610.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,655.80 : 63,983.70 = 13,073.40 : x
  2. Step 2: Convert to fraction form
    42,655.80/63,983.70 = 13,073.40/x
  3. Step 3: Cross multiply
    42,655.80x = 63,983.70 × 13,073.40
  4. Step 4: Simplify right side
    42,655.80x = 836,484,503.58
  5. Step 5: Solve for x
    x = 836,484,503.58/42,655.80
  6. Step 6: Final answer
    x = 19,610.10

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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.