Home / 9,139.23-12,611.70-5,160.92

Finding the Fourth Proportional to 9,139.23, 12,611.70 and 5,160.92

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Solution

The fourth proportional to 9,139.23, 12,611.70 and 5,160.92 is: 7,121.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,139.23 : 12,611.70 = 5,160.92 : x
  2. Step 2: Convert to fraction form
    9,139.23/12,611.70 = 5,160.92/x
  3. Step 3: Cross multiply
    9,139.23x = 12,611.70 × 5,160.92
  4. Step 4: Simplify right side
    9,139.23x = 65,087,911.71
  5. Step 5: Solve for x
    x = 65,087,911.71/9,139.23
  6. Step 6: Final answer
    x = 7,121.82

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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.