Home / 15,380.57-21,225.18-8,306.99

Finding the Fourth Proportional to 15,380.57, 21,225.18 and 8,306.99

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Solution

The fourth proportional to 15,380.57, 21,225.18 and 8,306.99 is: 11,463.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,380.57 : 21,225.18 = 8,306.99 : x
  2. Step 2: Convert to fraction form
    15,380.57/21,225.18 = 8,306.99/x
  3. Step 3: Cross multiply
    15,380.57x = 21,225.18 × 8,306.99
  4. Step 4: Simplify right side
    15,380.57x = 176,317,251.88
  5. Step 5: Solve for x
    x = 176,317,251.88/15,380.57
  6. Step 6: Final answer
    x = 11,463.64

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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.