Home / 20,825.18-28,738.08-11,393.12

Finding the Fourth Proportional to 20,825.18, 28,738.08 and 11,393.12

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Solution

The fourth proportional to 20,825.18, 28,738.08 and 11,393.12 is: 15,722.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,825.18 : 28,738.08 = 11,393.12 : x
  2. Step 2: Convert to fraction form
    20,825.18/28,738.08 = 11,393.12/x
  3. Step 3: Cross multiply
    20,825.18x = 28,738.08 × 11,393.12
  4. Step 4: Simplify right side
    20,825.18x = 327,416,394.01
  5. Step 5: Solve for x
    x = 327,416,394.01/20,825.18
  6. Step 6: Final answer
    x = 15,722.14

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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.