Home / 28,253.38-38,990.88-15,678.13

Finding the Fourth Proportional to 28,253.38, 38,990.88 and 15,678.13

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Solution

The fourth proportional to 28,253.38, 38,990.88 and 15,678.13 is: 21,636.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,253.38 : 38,990.88 = 15,678.13 : x
  2. Step 2: Convert to fraction form
    28,253.38/38,990.88 = 15,678.13/x
  3. Step 3: Cross multiply
    28,253.38x = 38,990.88 × 15,678.13
  4. Step 4: Simplify right side
    28,253.38x = 611,304,085.45
  5. Step 5: Solve for x
    x = 611,304,085.45/28,253.38
  6. Step 6: Final answer
    x = 21,636.49

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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.