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Finding the Fourth Proportional to 7,157.80, 9,879.84 and 4,324.74

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Solution

The fourth proportional to 7,157.80, 9,879.84 and 4,324.74 is: 5,969.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,157.80 : 9,879.84 = 4,324.74 : x
  2. Step 2: Convert to fraction form
    7,157.80/9,879.84 = 4,324.74/x
  3. Step 3: Cross multiply
    7,157.80x = 9,879.84 × 4,324.74
  4. Step 4: Simplify right side
    7,157.80x = 42,727,739.24
  5. Step 5: Solve for x
    x = 42,727,739.24/7,157.80
  6. Step 6: Final answer
    x = 5,969.40

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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.