Home / 20,952.87-28,915.17-11,521.50

Finding the Fourth Proportional to 20,952.87, 28,915.17 and 11,521.50

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Solution

The fourth proportional to 20,952.87, 28,915.17 and 11,521.50 is: 15,899.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,952.87 : 28,915.17 = 11,521.50 : x
  2. Step 2: Convert to fraction form
    20,952.87/28,915.17 = 11,521.50/x
  3. Step 3: Cross multiply
    20,952.87x = 28,915.17 × 11,521.50
  4. Step 4: Simplify right side
    20,952.87x = 333,146,131.16
  5. Step 5: Solve for x
    x = 333,146,131.16/20,952.87
  6. Step 6: Final answer
    x = 15,899.79

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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.