Home / 20,347.11-28,077.62-11,272.16

Finding the Fourth Proportional to 20,347.11, 28,077.62 and 11,272.16

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Solution

The fourth proportional to 20,347.11, 28,077.62 and 11,272.16 is: 15,554.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,347.11 : 28,077.62 = 11,272.16 : x
  2. Step 2: Convert to fraction form
    20,347.11/28,077.62 = 11,272.16/x
  3. Step 3: Cross multiply
    20,347.11x = 28,077.62 × 11,272.16
  4. Step 4: Simplify right side
    20,347.11x = 316,495,425.06
  5. Step 5: Solve for x
    x = 316,495,425.06/20,347.11
  6. Step 6: Final answer
    x = 15,554.81

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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.