Home / 13,747.80-20,612.70-5,422.80

Finding the Fourth Proportional to 13,747.80, 20,612.70 and 5,422.80

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Solution

The fourth proportional to 13,747.80, 20,612.70 and 5,422.80 is: 8,130.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,747.80 : 20,612.70 = 5,422.80 : x
  2. Step 2: Convert to fraction form
    13,747.80/20,612.70 = 5,422.80/x
  3. Step 3: Cross multiply
    13,747.80x = 20,612.70 × 5,422.80
  4. Step 4: Simplify right side
    13,747.80x = 111,778,549.56
  5. Step 5: Solve for x
    x = 111,778,549.56/13,747.80
  6. Step 6: Final answer
    x = 8,130.65

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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.