Home / 20,872.64-31,312.20-7,020.56

Finding the Fourth Proportional to 20,872.64, 31,312.20 and 7,020.56

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Solution

The fourth proportional to 20,872.64, 31,312.20 and 7,020.56 is: 10,531.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.64 : 31,312.20 = 7,020.56 : x
  2. Step 2: Convert to fraction form
    20,872.64/31,312.20 = 7,020.56/x
  3. Step 3: Cross multiply
    20,872.64x = 31,312.20 × 7,020.56
  4. Step 4: Simplify right side
    20,872.64x = 219,829,283.44
  5. Step 5: Solve for x
    x = 219,829,283.44/20,872.64
  6. Step 6: Final answer
    x = 10,531.93

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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.