Home / 21,178.17-31,769.71-7,133.38

Finding the Fourth Proportional to 21,178.17, 31,769.71 and 7,133.38

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Solution

The fourth proportional to 21,178.17, 31,769.71 and 7,133.38 is: 10,700.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,178.17 : 31,769.71 = 7,133.38 : x
  2. Step 2: Convert to fraction form
    21,178.17/31,769.71 = 7,133.38/x
  3. Step 3: Cross multiply
    21,178.17x = 31,769.71 × 7,133.38
  4. Step 4: Simplify right side
    21,178.17x = 226,625,316.66
  5. Step 5: Solve for x
    x = 226,625,316.66/21,178.17
  6. Step 6: Final answer
    x = 10,700.89

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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.