Home / 10,378.38-15,565.90-2,981.15

Finding the Fourth Proportional to 10,378.38, 15,565.90 and 2,981.15

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Solution

The fourth proportional to 10,378.38, 15,565.90 and 2,981.15 is: 4,471.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,378.38 : 15,565.90 = 2,981.15 : x
  2. Step 2: Convert to fraction form
    10,378.38/15,565.90 = 2,981.15/x
  3. Step 3: Cross multiply
    10,378.38x = 15,565.90 × 2,981.15
  4. Step 4: Simplify right side
    10,378.38x = 46,404,340.64
  5. Step 5: Solve for x
    x = 46,404,340.64/10,378.38
  6. Step 6: Final answer
    x = 4,471.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.