Home / 21,275.05-31,915.95-6,480.54

Finding the Fourth Proportional to 21,275.05, 31,915.95 and 6,480.54

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Solution

The fourth proportional to 21,275.05, 31,915.95 and 6,480.54 is: 9,721.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,275.05 : 31,915.95 = 6,480.54 : x
  2. Step 2: Convert to fraction form
    21,275.05/31,915.95 = 6,480.54/x
  3. Step 3: Cross multiply
    21,275.05x = 31,915.95 × 6,480.54
  4. Step 4: Simplify right side
    21,275.05x = 206,832,590.61
  5. Step 5: Solve for x
    x = 206,832,590.61/21,275.05
  6. Step 6: Final answer
    x = 9,721.84

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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.