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Finding the Fourth Proportional to 56,487.28, 84,671.80 and 19,034.40

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Solution

The fourth proportional to 56,487.28, 84,671.80 and 19,034.40 is: 28,531.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,487.28 : 84,671.80 = 19,034.40 : x
  2. Step 2: Convert to fraction form
    56,487.28/84,671.80 = 19,034.40/x
  3. Step 3: Cross multiply
    56,487.28x = 84,671.80 × 19,034.40
  4. Step 4: Simplify right side
    56,487.28x = 1,611,676,909.92
  5. Step 5: Solve for x
    x = 1,611,676,909.92/56,487.28
  6. Step 6: Final answer
    x = 28,531.68

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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.