Home / 38,516.92-53,153.40-21,521.20

Finding the Fourth Proportional to 38,516.92, 53,153.40 and 21,521.20

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Solution

The fourth proportional to 38,516.92, 53,153.40 and 21,521.20 is: 29,699.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,516.92 : 53,153.40 = 21,521.20 : x
  2. Step 2: Convert to fraction form
    38,516.92/53,153.40 = 21,521.20/x
  3. Step 3: Cross multiply
    38,516.92x = 53,153.40 × 21,521.20
  4. Step 4: Simplify right side
    38,516.92x = 1,143,924,952.08
  5. Step 5: Solve for x
    x = 1,143,924,952.08/38,516.92
  6. Step 6: Final answer
    x = 29,699.28

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.