Home / 15,155.10-20,912.76-8,439.66

Finding the Fourth Proportional to 15,155.10, 20,912.76 and 8,439.66

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Solution

The fourth proportional to 15,155.10, 20,912.76 and 8,439.66 is: 11,646.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,155.10 : 20,912.76 = 8,439.66 : x
  2. Step 2: Convert to fraction form
    15,155.10/20,912.76 = 8,439.66/x
  3. Step 3: Cross multiply
    15,155.10x = 20,912.76 × 8,439.66
  4. Step 4: Simplify right side
    15,155.10x = 176,496,584.06
  5. Step 5: Solve for x
    x = 176,496,584.06/15,155.10
  6. Step 6: Final answer
    x = 11,646.02

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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.