Home / 12,330.09-18,490.28-7,139.61

Finding the Fourth Proportional to 12,330.09, 18,490.28 and 7,139.61

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Solution

The fourth proportional to 12,330.09, 18,490.28 and 7,139.61 is: 10,706.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,330.09 : 18,490.28 = 7,139.61 : x
  2. Step 2: Convert to fraction form
    12,330.09/18,490.28 = 7,139.61/x
  3. Step 3: Cross multiply
    12,330.09x = 18,490.28 × 7,139.61
  4. Step 4: Simplify right side
    12,330.09x = 132,013,352.29
  5. Step 5: Solve for x
    x = 132,013,352.29/12,330.09
  6. Step 6: Final answer
    x = 10,706.60

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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.