Home / 21,278.30-31,916.84-5,695.92

Finding the Fourth Proportional to 21,278.30, 31,916.84 and 5,695.92

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Solution

The fourth proportional to 21,278.30, 31,916.84 and 5,695.92 is: 8,543.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.30 : 31,916.84 = 5,695.92 : x
  2. Step 2: Convert to fraction form
    21,278.30/31,916.84 = 5,695.92/x
  3. Step 3: Cross multiply
    21,278.30x = 31,916.84 × 5,695.92
  4. Step 4: Simplify right side
    21,278.30x = 181,795,738.81
  5. Step 5: Solve for x
    x = 181,795,738.81/21,278.30
  6. Step 6: Final answer
    x = 8,543.72

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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.