Home / 10,961.46-15,128.20-7,187.80

Finding the Fourth Proportional to 10,961.46, 15,128.20 and 7,187.80

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Solution

The fourth proportional to 10,961.46, 15,128.20 and 7,187.80 is: 9,920.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,961.46 : 15,128.20 = 7,187.80 : x
  2. Step 2: Convert to fraction form
    10,961.46/15,128.20 = 7,187.80/x
  3. Step 3: Cross multiply
    10,961.46x = 15,128.20 × 7,187.80
  4. Step 4: Simplify right side
    10,961.46x = 108,738,475.96
  5. Step 5: Solve for x
    x = 108,738,475.96/10,961.46
  6. Step 6: Final answer
    x = 9,920.07

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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.