Home / 15,399.45-21,251.25-8,325.90

Finding the Fourth Proportional to 15,399.45, 21,251.25 and 8,325.90

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Solution

The fourth proportional to 15,399.45, 21,251.25 and 8,325.90 is: 11,489.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,399.45 : 21,251.25 = 8,325.90 : x
  2. Step 2: Convert to fraction form
    15,399.45/21,251.25 = 8,325.90/x
  3. Step 3: Cross multiply
    15,399.45x = 21,251.25 × 8,325.90
  4. Step 4: Simplify right side
    15,399.45x = 176,935,782.38
  5. Step 5: Solve for x
    x = 176,935,782.38/15,399.45
  6. Step 6: Final answer
    x = 11,489.75

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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.