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Finding the Fourth Proportional to 38,687.04, 53,387.10 and 21,920.04

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Solution

The fourth proportional to 38,687.04, 53,387.10 and 21,920.04 is: 30,249.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,687.04 : 53,387.10 = 21,920.04 : x
  2. Step 2: Convert to fraction form
    38,687.04/53,387.10 = 21,920.04/x
  3. Step 3: Cross multiply
    38,687.04x = 53,387.10 × 21,920.04
  4. Step 4: Simplify right side
    38,687.04x = 1,170,247,367.48
  5. Step 5: Solve for x
    x = 1,170,247,367.48/38,687.04
  6. Step 6: Final answer
    x = 30,249.08

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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.