Home / 21,278.16-31,917.24-5,695.36

Finding the Fourth Proportional to 21,278.16, 31,917.24 and 5,695.36

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Solution

The fourth proportional to 21,278.16, 31,917.24 and 5,695.36 is: 8,543.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.16 : 31,917.24 = 5,695.36 : x
  2. Step 2: Convert to fraction form
    21,278.16/31,917.24 = 5,695.36/x
  3. Step 3: Cross multiply
    21,278.16x = 31,917.24 × 5,695.36
  4. Step 4: Simplify right side
    21,278.16x = 181,780,172.01
  5. Step 5: Solve for x
    x = 181,780,172.01/21,278.16
  6. Step 6: Final answer
    x = 8,543.04

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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.