Home / 20,681.47-28,540.65-11,250.06

Finding the Fourth Proportional to 20,681.47, 28,540.65 and 11,250.06

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Solution

The fourth proportional to 20,681.47, 28,540.65 and 11,250.06 is: 15,525.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,681.47 : 28,540.65 = 11,250.06 : x
  2. Step 2: Convert to fraction form
    20,681.47/28,540.65 = 11,250.06/x
  3. Step 3: Cross multiply
    20,681.47x = 28,540.65 × 11,250.06
  4. Step 4: Simplify right side
    20,681.47x = 321,083,882.24
  5. Step 5: Solve for x
    x = 321,083,882.24/20,681.47
  6. Step 6: Final answer
    x = 15,525.20

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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.