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Finding the Fourth Proportional to 6,491.79, 8,959.50 and 4,255.56

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Solution

The fourth proportional to 6,491.79, 8,959.50 and 4,255.56 is: 5,873.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,491.79 : 8,959.50 = 4,255.56 : x
  2. Step 2: Convert to fraction form
    6,491.79/8,959.50 = 4,255.56/x
  3. Step 3: Cross multiply
    6,491.79x = 8,959.50 × 4,255.56
  4. Step 4: Simplify right side
    6,491.79x = 38,127,689.82
  5. Step 5: Solve for x
    x = 38,127,689.82/6,491.79
  6. Step 6: Final answer
    x = 5,873.22

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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.