Home / 15,469.20-21,352.64-11,005.90

Finding the Fourth Proportional to 15,469.20, 21,352.64 and 11,005.90

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Solution

The fourth proportional to 15,469.20, 21,352.64 and 11,005.90 is: 15,191.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,469.20 : 21,352.64 = 11,005.90 : x
  2. Step 2: Convert to fraction form
    15,469.20/21,352.64 = 11,005.90/x
  3. Step 3: Cross multiply
    15,469.20x = 21,352.64 × 11,005.90
  4. Step 4: Simplify right side
    15,469.20x = 235,005,020.58
  5. Step 5: Solve for x
    x = 235,005,020.58/15,469.20
  6. Step 6: Final answer
    x = 15,191.80

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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.