Home / 8,990.92-12,407.18-5,635.54

Finding the Fourth Proportional to 8,990.92, 12,407.18 and 5,635.54

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Solution

The fourth proportional to 8,990.92, 12,407.18 and 5,635.54 is: 7,776.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990.92 : 12,407.18 = 5,635.54 : x
  2. Step 2: Convert to fraction form
    8,990.92/12,407.18 = 5,635.54/x
  3. Step 3: Cross multiply
    8,990.92x = 12,407.18 × 5,635.54
  4. Step 4: Simplify right side
    8,990.92x = 69,921,159.18
  5. Step 5: Solve for x
    x = 69,921,159.18/8,990.92
  6. Step 6: Final answer
    x = 7,776.86

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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.