Home / 6,490.13-8,956.56-3,972.20

Finding the Fourth Proportional to 6,490.13, 8,956.56 and 3,972.20

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Solution

The fourth proportional to 6,490.13, 8,956.56 and 3,972.20 is: 5,481.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,490.13 : 8,956.56 = 3,972.20 : x
  2. Step 2: Convert to fraction form
    6,490.13/8,956.56 = 3,972.20/x
  3. Step 3: Cross multiply
    6,490.13x = 8,956.56 × 3,972.20
  4. Step 4: Simplify right side
    6,490.13x = 35,577,247.63
  5. Step 5: Solve for x
    x = 35,577,247.63/6,490.13
  6. Step 6: Final answer
    x = 5,481.75

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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.