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Finding the Fourth Proportional to 57,616.50, 86,424.75 and 13,840.50

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Solution

The fourth proportional to 57,616.50, 86,424.75 and 13,840.50 is: 20,760.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,616.50 : 86,424.75 = 13,840.50 : x
  2. Step 2: Convert to fraction form
    57,616.50/86,424.75 = 13,840.50/x
  3. Step 3: Cross multiply
    57,616.50x = 86,424.75 × 13,840.50
  4. Step 4: Simplify right side
    57,616.50x = 1,196,161,752.38
  5. Step 5: Solve for x
    x = 1,196,161,752.38/57,616.50
  6. Step 6: Final answer
    x = 20,760.75

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Similar ratio
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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.