Home / 20,521.68-28,319.82-11,090.22

Finding the Fourth Proportional to 20,521.68, 28,319.82 and 11,090.22

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Solution

The fourth proportional to 20,521.68, 28,319.82 and 11,090.22 is: 15,304.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,521.68 : 28,319.82 = 11,090.22 : x
  2. Step 2: Convert to fraction form
    20,521.68/28,319.82 = 11,090.22/x
  3. Step 3: Cross multiply
    20,521.68x = 28,319.82 × 11,090.22
  4. Step 4: Simplify right side
    20,521.68x = 314,073,034.16
  5. Step 5: Solve for x
    x = 314,073,034.16/20,521.68
  6. Step 6: Final answer
    x = 15,304.45

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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.