Home / 15,399.40-21,251.10-8,325.80

Finding the Fourth Proportional to 15,399.40, 21,251.10 and 8,325.80

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Solution

The fourth proportional to 15,399.40, 21,251.10 and 8,325.80 is: 11,489.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,399.40 : 21,251.10 = 8,325.80 : x
  2. Step 2: Convert to fraction form
    15,399.40/21,251.10 = 8,325.80/x
  3. Step 3: Cross multiply
    15,399.40x = 21,251.10 × 8,325.80
  4. Step 4: Simplify right side
    15,399.40x = 176,932,408.38
  5. Step 5: Solve for x
    x = 176,932,408.38/15,399.40
  6. Step 6: Final answer
    x = 11,489.57

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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.