Home / 28,001.30-38,640.04-15,426.05

Finding the Fourth Proportional to 28,001.30, 38,640.04 and 15,426.05

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Solution

The fourth proportional to 28,001.30, 38,640.04 and 15,426.05 is: 21,286.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,001.30 : 38,640.04 = 15,426.05 : x
  2. Step 2: Convert to fraction form
    28,001.30/38,640.04 = 15,426.05/x
  3. Step 3: Cross multiply
    28,001.30x = 38,640.04 × 15,426.05
  4. Step 4: Simplify right side
    28,001.30x = 596,062,957.28
  5. Step 5: Solve for x
    x = 596,062,957.28/28,001.30
  6. Step 6: Final answer
    x = 21,286.98

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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.