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Finding the Fourth Proportional to 12,378.60, 17,082.54 and 7,073.61

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Solution

The fourth proportional to 12,378.60, 17,082.54 and 7,073.61 is: 9,761.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,378.60 : 17,082.54 = 7,073.61 : x
  2. Step 2: Convert to fraction form
    12,378.60/17,082.54 = 7,073.61/x
  3. Step 3: Cross multiply
    12,378.60x = 17,082.54 × 7,073.61
  4. Step 4: Simplify right side
    12,378.60x = 120,835,225.77
  5. Step 5: Solve for x
    x = 120,835,225.77/12,378.60
  6. Step 6: Final answer
    x = 9,761.62

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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.