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Finding the Fourth Proportional to 42,463.60, 63,679.20 and 12,871.60

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Solution

The fourth proportional to 42,463.60, 63,679.20 and 12,871.60 is: 19,302.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,463.60 : 63,679.20 = 12,871.60 : x
  2. Step 2: Convert to fraction form
    42,463.60/63,679.20 = 12,871.60/x
  3. Step 3: Cross multiply
    42,463.60x = 63,679.20 × 12,871.60
  4. Step 4: Simplify right side
    42,463.60x = 819,653,190.72
  5. Step 5: Solve for x
    x = 819,653,190.72/42,463.60
  6. Step 6: Final answer
    x = 19,302.49

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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.