Home / 15,155.12-20,915.70-8,441.30

Finding the Fourth Proportional to 15,155.12, 20,915.70 and 8,441.30

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Solution

The fourth proportional to 15,155.12, 20,915.70 and 8,441.30 is: 11,649.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,155.12 : 20,915.70 = 8,441.30 : x
  2. Step 2: Convert to fraction form
    15,155.12/20,915.70 = 8,441.30/x
  3. Step 3: Cross multiply
    15,155.12x = 20,915.70 × 8,441.30
  4. Step 4: Simplify right side
    15,155.12x = 176,555,698.41
  5. Step 5: Solve for x
    x = 176,555,698.41/15,155.12
  6. Step 6: Final answer
    x = 11,649.90

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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.