Home / 15,629.97-21,569.14-8,915.70

Finding the Fourth Proportional to 15,629.97, 21,569.14 and 8,915.70

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Solution

The fourth proportional to 15,629.97, 21,569.14 and 8,915.70 is: 12,303.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,629.97 : 21,569.14 = 8,915.70 : x
  2. Step 2: Convert to fraction form
    15,629.97/21,569.14 = 8,915.70/x
  3. Step 3: Cross multiply
    15,629.97x = 21,569.14 × 8,915.70
  4. Step 4: Simplify right side
    15,629.97x = 192,304,023.38
  5. Step 5: Solve for x
    x = 192,304,023.38/15,629.97
  6. Step 6: Final answer
    x = 12,303.54

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1.5x scale

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.