Home / 14,721.20-20,311.80-9,949.90

Finding the Fourth Proportional to 14,721.20, 20,311.80 and 9,949.90

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Solution

The fourth proportional to 14,721.20, 20,311.80 and 9,949.90 is: 13,728.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,721.20 : 20,311.80 = 9,949.90 : x
  2. Step 2: Convert to fraction form
    14,721.20/20,311.80 = 9,949.90/x
  3. Step 3: Cross multiply
    14,721.20x = 20,311.80 × 9,949.90
  4. Step 4: Simplify right side
    14,721.20x = 202,100,378.82
  5. Step 5: Solve for x
    x = 202,100,378.82/14,721.20
  6. Step 6: Final answer
    x = 13,728.53

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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.