Home / 38,979.13-53,787.97-21,987.55

Finding the Fourth Proportional to 38,979.13, 53,787.97 and 21,987.55

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Solution

The fourth proportional to 38,979.13, 53,787.97 and 21,987.55 is: 30,341.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,979.13 : 53,787.97 = 21,987.55 : x
  2. Step 2: Convert to fraction form
    38,979.13/53,787.97 = 21,987.55/x
  3. Step 3: Cross multiply
    38,979.13x = 53,787.97 × 21,987.55
  4. Step 4: Simplify right side
    38,979.13x = 1,182,665,836.33
  5. Step 5: Solve for x
    x = 1,182,665,836.33/38,979.13
  6. Step 6: Final answer
    x = 30,341.00

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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.