Home / 13,518.90-20,279.40-4,755.78

Finding the Fourth Proportional to 13,518.90, 20,279.40 and 4,755.78

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Solution

The fourth proportional to 13,518.90, 20,279.40 and 4,755.78 is: 7,134.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,518.90 : 20,279.40 = 4,755.78 : x
  2. Step 2: Convert to fraction form
    13,518.90/20,279.40 = 4,755.78/x
  3. Step 3: Cross multiply
    13,518.90x = 20,279.40 × 4,755.78
  4. Step 4: Simplify right side
    13,518.90x = 96,444,364.93
  5. Step 5: Solve for x
    x = 96,444,364.93/13,518.90
  6. Step 6: Final answer
    x = 7,134.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.