Home / 15,311.05-21,080.92-13,909.65

Finding the Fourth Proportional to 15,311.05, 21,080.92 and 13,909.65

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Solution

The fourth proportional to 15,311.05, 21,080.92 and 13,909.65 is: 19,151.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,311.05 : 21,080.92 = 13,909.65 : x
  2. Step 2: Convert to fraction form
    15,311.05/21,080.92 = 13,909.65/x
  3. Step 3: Cross multiply
    15,311.05x = 21,080.92 × 13,909.65
  4. Step 4: Simplify right side
    15,311.05x = 293,228,218.88
  5. Step 5: Solve for x
    x = 293,228,218.88/15,311.05
  6. Step 6: Final answer
    x = 19,151.41

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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.