Home / 15,418.40-23,138.40-9,885.20

Finding the Fourth Proportional to 15,418.40, 23,138.40 and 9,885.20

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Solution

The fourth proportional to 15,418.40, 23,138.40 and 9,885.20 is: 14,834.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,418.40 : 23,138.40 = 9,885.20 : x
  2. Step 2: Convert to fraction form
    15,418.40/23,138.40 = 9,885.20/x
  3. Step 3: Cross multiply
    15,418.40x = 23,138.40 × 9,885.20
  4. Step 4: Simplify right side
    15,418.40x = 228,727,711.68
  5. Step 5: Solve for x
    x = 228,727,711.68/15,418.40
  6. Step 6: Final answer
    x = 14,834.72

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1.5x scale

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.