Home / 21,158.61-31,758.56-10,072.95

Finding the Fourth Proportional to 21,158.61, 31,758.56 and 10,072.95

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Solution

The fourth proportional to 21,158.61, 31,758.56 and 10,072.95 is: 15,119.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,158.61 : 31,758.56 = 10,072.95 : x
  2. Step 2: Convert to fraction form
    21,158.61/31,758.56 = 10,072.95/x
  3. Step 3: Cross multiply
    21,158.61x = 31,758.56 × 10,072.95
  4. Step 4: Simplify right side
    21,158.61x = 319,902,386.95
  5. Step 5: Solve for x
    x = 319,902,386.95/21,158.61
  6. Step 6: Final answer
    x = 15,119.25

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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.