Home / 31,084.20-42,912-21,065.52

Finding the Fourth Proportional to 31,084.20, 42,912 and 21,065.52

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Solution

The fourth proportional to 31,084.20, 42,912 and 21,065.52 is: 29,081.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,084.20 : 42,912 = 21,065.52 : x
  2. Step 2: Convert to fraction form
    31,084.20/42,912 = 21,065.52/x
  3. Step 3: Cross multiply
    31,084.20x = 42,912 × 21,065.52
  4. Step 4: Simplify right side
    31,084.20x = 903,963,594.24
  5. Step 5: Solve for x
    x = 903,963,594.24/31,084.20
  6. Step 6: Final answer
    x = 29,081.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.