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Finding the Fourth Proportional to 15,157.95, 20,915.19 and 8,443.41

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Solution

The fourth proportional to 15,157.95, 20,915.19 and 8,443.41 is: 11,650.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,157.95 : 20,915.19 = 8,443.41 : x
  2. Step 2: Convert to fraction form
    15,157.95/20,915.19 = 8,443.41/x
  3. Step 3: Cross multiply
    15,157.95x = 20,915.19 × 8,443.41
  4. Step 4: Simplify right side
    15,157.95x = 176,595,445.97
  5. Step 5: Solve for x
    x = 176,595,445.97/15,157.95
  6. Step 6: Final answer
    x = 11,650.35

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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.