Home / 10,955.20-16,431.20-5,407.12

Finding the Fourth Proportional to 10,955.20, 16,431.20 and 5,407.12

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Solution

The fourth proportional to 10,955.20, 16,431.20 and 5,407.12 is: 8,109.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,955.20 : 16,431.20 = 5,407.12 : x
  2. Step 2: Convert to fraction form
    10,955.20/16,431.20 = 5,407.12/x
  3. Step 3: Cross multiply
    10,955.20x = 16,431.20 × 5,407.12
  4. Step 4: Simplify right side
    10,955.20x = 88,845,470.14
  5. Step 5: Solve for x
    x = 88,845,470.14/10,955.20
  6. Step 6: Final answer
    x = 8,109.89

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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.