Home / 38,934.80-53,731.13-21,939.20

Finding the Fourth Proportional to 38,934.80, 53,731.13 and 21,939.20

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Solution

The fourth proportional to 38,934.80, 53,731.13 and 21,939.20 is: 30,276.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,934.80 : 53,731.13 = 21,939.20 : x
  2. Step 2: Convert to fraction form
    38,934.80/53,731.13 = 21,939.20/x
  3. Step 3: Cross multiply
    38,934.80x = 53,731.13 × 21,939.20
  4. Step 4: Simplify right side
    38,934.80x = 1,178,818,007.30
  5. Step 5: Solve for x
    x = 1,178,818,007.30/38,934.80
  6. Step 6: Final answer
    x = 30,276.72

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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.