Home / 15,627.35-21,565.20-8,915.15

Finding the Fourth Proportional to 15,627.35, 21,565.20 and 8,915.15

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Solution

The fourth proportional to 15,627.35, 21,565.20 and 8,915.15 is: 12,302.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,627.35 : 21,565.20 = 8,915.15 : x
  2. Step 2: Convert to fraction form
    15,627.35/21,565.20 = 8,915.15/x
  3. Step 3: Cross multiply
    15,627.35x = 21,565.20 × 8,915.15
  4. Step 4: Simplify right side
    15,627.35x = 192,257,046.69
  5. Step 5: Solve for x
    x = 192,257,046.69/15,627.35
  6. Step 6: Final answer
    x = 12,302.60

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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.