Home / 21,180.76-31,750.49-10,084.47

Finding the Fourth Proportional to 21,180.76, 31,750.49 and 10,084.47

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Solution

The fourth proportional to 21,180.76, 31,750.49 and 10,084.47 is: 15,116.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,180.76 : 31,750.49 = 10,084.47 : x
  2. Step 2: Convert to fraction form
    21,180.76/31,750.49 = 10,084.47/x
  3. Step 3: Cross multiply
    21,180.76x = 31,750.49 × 10,084.47
  4. Step 4: Simplify right side
    21,180.76x = 320,186,813.47
  5. Step 5: Solve for x
    x = 320,186,813.47/21,180.76
  6. Step 6: Final answer
    x = 15,116.87

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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.