Home / 21,187.42-31,791.46-8,711.20

Finding the Fourth Proportional to 21,187.42, 31,791.46 and 8,711.20

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Solution

The fourth proportional to 21,187.42, 31,791.46 and 8,711.20 is: 13,071.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,187.42 : 31,791.46 = 8,711.20 : x
  2. Step 2: Convert to fraction form
    21,187.42/31,791.46 = 8,711.20/x
  3. Step 3: Cross multiply
    21,187.42x = 31,791.46 × 8,711.20
  4. Step 4: Simplify right side
    21,187.42x = 276,941,646.32
  5. Step 5: Solve for x
    x = 276,941,646.32/21,187.42
  6. Step 6: Final answer
    x = 13,071.04

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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.