Home / 21,177.11-31,768.59-7,141.15

Finding the Fourth Proportional to 21,177.11, 31,768.59 and 7,141.15

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Solution

The fourth proportional to 21,177.11, 31,768.59 and 7,141.15 is: 10,712.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,177.11 : 31,768.59 = 7,141.15 : x
  2. Step 2: Convert to fraction form
    21,177.11/31,768.59 = 7,141.15/x
  3. Step 3: Cross multiply
    21,177.11x = 31,768.59 × 7,141.15
  4. Step 4: Simplify right side
    21,177.11x = 226,864,071.93
  5. Step 5: Solve for x
    x = 226,864,071.93/21,177.11
  6. Step 6: Final answer
    x = 10,712.70

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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.