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Finding the Fourth Proportional to 56,463.80, 84,641.70 and 20,915.60

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Solution

The fourth proportional to 56,463.80, 84,641.70 and 20,915.60 is: 31,353.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,463.80 : 84,641.70 = 20,915.60 : x
  2. Step 2: Convert to fraction form
    56,463.80/84,641.70 = 20,915.60/x
  3. Step 3: Cross multiply
    56,463.80x = 84,641.70 × 20,915.60
  4. Step 4: Simplify right side
    56,463.80x = 1,770,331,940.52
  5. Step 5: Solve for x
    x = 1,770,331,940.52/56,463.80
  6. Step 6: Final answer
    x = 31,353.40

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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.