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Finding the Fourth Proportional to 12,909.16, 17,811.30 and 7,604.20

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Solution

The fourth proportional to 12,909.16, 17,811.30 and 7,604.20 is: 10,491.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,909.16 : 17,811.30 = 7,604.20 : x
  2. Step 2: Convert to fraction form
    12,909.16/17,811.30 = 7,604.20/x
  3. Step 3: Cross multiply
    12,909.16x = 17,811.30 × 7,604.20
  4. Step 4: Simplify right side
    12,909.16x = 135,440,687.46
  5. Step 5: Solve for x
    x = 135,440,687.46/12,909.16
  6. Step 6: Final answer
    x = 10,491.83

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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.