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Finding the Fourth Proportional to 42,302.80, 63,429.90 and 12,716.20

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Solution

The fourth proportional to 42,302.80, 63,429.90 and 12,716.20 is: 19,067.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,302.80 : 63,429.90 = 12,716.20 : x
  2. Step 2: Convert to fraction form
    42,302.80/63,429.90 = 12,716.20/x
  3. Step 3: Cross multiply
    42,302.80x = 63,429.90 × 12,716.20
  4. Step 4: Simplify right side
    42,302.80x = 806,587,294.38
  5. Step 5: Solve for x
    x = 806,587,294.38/42,302.80
  6. Step 6: Final answer
    x = 19,067.00

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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.