Home / 15,760.11-21,748.77-8,686.38

Finding the Fourth Proportional to 15,760.11, 21,748.77 and 8,686.38

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Solution

The fourth proportional to 15,760.11, 21,748.77 and 8,686.38 is: 11,987.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,760.11 : 21,748.77 = 8,686.38 : x
  2. Step 2: Convert to fraction form
    15,760.11/21,748.77 = 8,686.38/x
  3. Step 3: Cross multiply
    15,760.11x = 21,748.77 × 8,686.38
  4. Step 4: Simplify right side
    15,760.11x = 188,918,080.75
  5. Step 5: Solve for x
    x = 188,918,080.75/15,760.11
  6. Step 6: Final answer
    x = 11,987.10

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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.