Home / 20,986.76-29,000.22-15,669.92

Finding the Fourth Proportional to 20,986.76, 29,000.22 and 15,669.92

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Solution

The fourth proportional to 20,986.76, 29,000.22 and 15,669.92 is: 21,653.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.76 : 29,000.22 = 15,669.92 : x
  2. Step 2: Convert to fraction form
    20,986.76/29,000.22 = 15,669.92/x
  3. Step 3: Cross multiply
    20,986.76x = 29,000.22 × 15,669.92
  4. Step 4: Simplify right side
    20,986.76x = 454,431,127.38
  5. Step 5: Solve for x
    x = 454,431,127.38/20,986.76
  6. Step 6: Final answer
    x = 21,653.23

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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.