Home / 28,199.38-38,915.20-15,624.12

Finding the Fourth Proportional to 28,199.38, 38,915.20 and 15,624.12

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Solution

The fourth proportional to 28,199.38, 38,915.20 and 15,624.12 is: 21,561.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,199.38 : 38,915.20 = 15,624.12 : x
  2. Step 2: Convert to fraction form
    28,199.38/38,915.20 = 15,624.12/x
  3. Step 3: Cross multiply
    28,199.38x = 38,915.20 × 15,624.12
  4. Step 4: Simplify right side
    28,199.38x = 608,015,754.62
  5. Step 5: Solve for x
    x = 608,015,754.62/28,199.38
  6. Step 6: Final answer
    x = 21,561.32

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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.