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Finding the Fourth Proportional to 7,471.60, 10,315.24 and 6,641.20

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Solution

The fourth proportional to 7,471.60, 10,315.24 and 6,641.20 is: 9,168.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,471.60 : 10,315.24 = 6,641.20 : x
  2. Step 2: Convert to fraction form
    7,471.60/10,315.24 = 6,641.20/x
  3. Step 3: Cross multiply
    7,471.60x = 10,315.24 × 6,641.20
  4. Step 4: Simplify right side
    7,471.60x = 68,505,571.89
  5. Step 5: Solve for x
    x = 68,505,571.89/7,471.60
  6. Step 6: Final answer
    x = 9,168.80

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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.