Home / 15,153.75-20,912.58-8,439.66

Finding the Fourth Proportional to 15,153.75, 20,912.58 and 8,439.66

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Solution

The fourth proportional to 15,153.75, 20,912.58 and 8,439.66 is: 11,646.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,153.75 : 20,912.58 = 8,439.66 : x
  2. Step 2: Convert to fraction form
    15,153.75/20,912.58 = 8,439.66/x
  3. Step 3: Cross multiply
    15,153.75x = 20,912.58 × 8,439.66
  4. Step 4: Simplify right side
    15,153.75x = 176,495,064.92
  5. Step 5: Solve for x
    x = 176,495,064.92/15,153.75
  6. Step 6: Final answer
    x = 11,646.96

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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.