Home / 15,116.31-20,861.21-8,402.60

Finding the Fourth Proportional to 15,116.31, 20,861.21 and 8,402.60

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Solution

The fourth proportional to 15,116.31, 20,861.21 and 8,402.60 is: 11,595.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,116.31 : 20,861.21 = 8,402.60 : x
  2. Step 2: Convert to fraction form
    15,116.31/20,861.21 = 8,402.60/x
  3. Step 3: Cross multiply
    15,116.31x = 20,861.21 × 8,402.60
  4. Step 4: Simplify right side
    15,116.31x = 175,288,476.31
  5. Step 5: Solve for x
    x = 175,288,476.31/15,116.31
  6. Step 6: Final answer
    x = 11,595.98

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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.