Home / 20,521.67-28,319.82-11,090.21

Finding the Fourth Proportional to 20,521.67, 28,319.82 and 11,090.21

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Solution

The fourth proportional to 20,521.67, 28,319.82 and 11,090.21 is: 15,304.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,521.67 : 28,319.82 = 11,090.21 : x
  2. Step 2: Convert to fraction form
    20,521.67/28,319.82 = 11,090.21/x
  3. Step 3: Cross multiply
    20,521.67x = 28,319.82 × 11,090.21
  4. Step 4: Simplify right side
    20,521.67x = 314,072,750.96
  5. Step 5: Solve for x
    x = 314,072,750.96/20,521.67
  6. Step 6: Final answer
    x = 15,304.44

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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.