Home / 15,155.90-20,915.78-8,441.52

Finding the Fourth Proportional to 15,155.90, 20,915.78 and 8,441.52

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Solution

The fourth proportional to 15,155.90, 20,915.78 and 8,441.52 is: 11,649.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,155.90 : 20,915.78 = 8,441.52 : x
  2. Step 2: Convert to fraction form
    15,155.90/20,915.78 = 8,441.52/x
  3. Step 3: Cross multiply
    15,155.90x = 20,915.78 × 8,441.52
  4. Step 4: Simplify right side
    15,155.90x = 176,560,854.54
  5. Step 5: Solve for x
    x = 176,560,854.54/15,155.90
  6. Step 6: Final answer
    x = 11,649.65

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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.