Home / 21,211.02-31,767.30-20,472.93

Finding the Fourth Proportional to 21,211.02, 31,767.30 and 20,472.93

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Solution

The fourth proportional to 21,211.02, 31,767.30 and 20,472.93 is: 30,661.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,211.02 : 31,767.30 = 20,472.93 : x
  2. Step 2: Convert to fraction form
    21,211.02/31,767.30 = 20,472.93/x
  3. Step 3: Cross multiply
    21,211.02x = 31,767.30 × 20,472.93
  4. Step 4: Simplify right side
    21,211.02x = 650,369,709.19
  5. Step 5: Solve for x
    x = 650,369,709.19/21,211.02
  6. Step 6: Final answer
    x = 30,661.88

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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.