Home / 20,822.64-31,156.20-12,061.68

Finding the Fourth Proportional to 20,822.64, 31,156.20 and 12,061.68

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Solution

The fourth proportional to 20,822.64, 31,156.20 and 12,061.68 is: 18,047.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,822.64 : 31,156.20 = 12,061.68 : x
  2. Step 2: Convert to fraction form
    20,822.64/31,156.20 = 12,061.68/x
  3. Step 3: Cross multiply
    20,822.64x = 31,156.20 × 12,061.68
  4. Step 4: Simplify right side
    20,822.64x = 375,796,114.42
  5. Step 5: Solve for x
    x = 375,796,114.42/20,822.64
  6. Step 6: Final answer
    x = 18,047.48

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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.