Home / 15,630.38-21,569.15-8,915.76

Finding the Fourth Proportional to 15,630.38, 21,569.15 and 8,915.76

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Solution

The fourth proportional to 15,630.38, 21,569.15 and 8,915.76 is: 12,303.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,630.38 : 21,569.15 = 8,915.76 : x
  2. Step 2: Convert to fraction form
    15,630.38/21,569.15 = 8,915.76/x
  3. Step 3: Cross multiply
    15,630.38x = 21,569.15 × 8,915.76
  4. Step 4: Simplify right side
    15,630.38x = 192,305,364.80
  5. Step 5: Solve for x
    x = 192,305,364.80/15,630.38
  6. Step 6: Final answer
    x = 12,303.31

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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.