Home / 52,286.40-78,462-21,121.92

Finding the Fourth Proportional to 52,286.40, 78,462 and 21,121.92

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Solution

The fourth proportional to 52,286.40, 78,462 and 21,121.92 is: 31,695.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,286.40 : 78,462 = 21,121.92 : x
  2. Step 2: Convert to fraction form
    52,286.40/78,462 = 21,121.92/x
  3. Step 3: Cross multiply
    52,286.40x = 78,462 × 21,121.92
  4. Step 4: Simplify right side
    52,286.40x = 1,657,268,087.04
  5. Step 5: Solve for x
    x = 1,657,268,087.04/52,286.40
  6. Step 6: Final answer
    x = 31,695.97

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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.