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Finding the Fourth Proportional to 55,640.60, 83,460.88 and 13,520.46

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Solution

The fourth proportional to 55,640.60, 83,460.88 and 13,520.46 is: 20,280.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,640.60 : 83,460.88 = 13,520.46 : x
  2. Step 2: Convert to fraction form
    55,640.60/83,460.88 = 13,520.46/x
  3. Step 3: Cross multiply
    55,640.60x = 83,460.88 × 13,520.46
  4. Step 4: Simplify right side
    55,640.60x = 1,128,429,489.60
  5. Step 5: Solve for x
    x = 1,128,429,489.60/55,640.60
  6. Step 6: Final answer
    x = 20,280.69

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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.