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Finding the Fourth Proportional to 38,640.60, 53,324.70 and 21,644.70

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Solution

The fourth proportional to 38,640.60, 53,324.70 and 21,644.70 is: 29,870.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,640.60 : 53,324.70 = 21,644.70 : x
  2. Step 2: Convert to fraction form
    38,640.60/53,324.70 = 21,644.70/x
  3. Step 3: Cross multiply
    38,640.60x = 53,324.70 × 21,644.70
  4. Step 4: Simplify right side
    38,640.60x = 1,154,197,134.09
  5. Step 5: Solve for x
    x = 1,154,197,134.09/38,640.60
  6. Step 6: Final answer
    x = 29,870.06

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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.