Home / 15,116.78-20,861.86-8,402.52

Finding the Fourth Proportional to 15,116.78, 20,861.86 and 8,402.52

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Solution

The fourth proportional to 15,116.78, 20,861.86 and 8,402.52 is: 11,595.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,116.78 : 20,861.86 = 8,402.52 : x
  2. Step 2: Convert to fraction form
    15,116.78/20,861.86 = 8,402.52/x
  3. Step 3: Cross multiply
    15,116.78x = 20,861.86 × 8,402.52
  4. Step 4: Simplify right side
    15,116.78x = 175,292,195.89
  5. Step 5: Solve for x
    x = 175,292,195.89/15,116.78
  6. Step 6: Final answer
    x = 11,595.87

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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.