Home / 21,166.28-31,747.18-8,687.62

Finding the Fourth Proportional to 21,166.28, 31,747.18 and 8,687.62

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Solution

The fourth proportional to 21,166.28, 31,747.18 and 8,687.62 is: 13,030.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,166.28 : 31,747.18 = 8,687.62 : x
  2. Step 2: Convert to fraction form
    21,166.28/31,747.18 = 8,687.62/x
  3. Step 3: Cross multiply
    21,166.28x = 31,747.18 × 8,687.62
  4. Step 4: Simplify right side
    21,166.28x = 275,807,435.91
  5. Step 5: Solve for x
    x = 275,807,435.91/21,166.28
  6. Step 6: Final answer
    x = 13,030.51

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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.