Home / 20,738.60-28,618.92-11,307.18

Finding the Fourth Proportional to 20,738.60, 28,618.92 and 11,307.18

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Solution

The fourth proportional to 20,738.60, 28,618.92 and 11,307.18 is: 15,603.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,738.60 : 28,618.92 = 11,307.18 : x
  2. Step 2: Convert to fraction form
    20,738.60/28,618.92 = 11,307.18/x
  3. Step 3: Cross multiply
    20,738.60x = 28,618.92 × 11,307.18
  4. Step 4: Simplify right side
    20,738.60x = 323,599,279.85
  5. Step 5: Solve for x
    x = 323,599,279.85/20,738.60
  6. Step 6: Final answer
    x = 15,603.72

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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.