Home / 15,153.18-20,910.92-8,438.66

Finding the Fourth Proportional to 15,153.18, 20,910.92 and 8,438.66

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Solution

The fourth proportional to 15,153.18, 20,910.92 and 8,438.66 is: 11,645.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,153.18 : 20,910.92 = 8,438.66 : x
  2. Step 2: Convert to fraction form
    15,153.18/20,910.92 = 8,438.66/x
  3. Step 3: Cross multiply
    15,153.18x = 20,910.92 × 8,438.66
  4. Step 4: Simplify right side
    15,153.18x = 176,460,154.25
  5. Step 5: Solve for x
    x = 176,460,154.25/15,153.18
  6. Step 6: Final answer
    x = 11,645.09

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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.