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Finding the Fourth Proportional to 7,109.80, 10,665.18 and 4,509.16

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Solution

The fourth proportional to 7,109.80, 10,665.18 and 4,509.16 is: 6,764.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,109.80 : 10,665.18 = 4,509.16 : x
  2. Step 2: Convert to fraction form
    7,109.80/10,665.18 = 4,509.16/x
  3. Step 3: Cross multiply
    7,109.80x = 10,665.18 × 4,509.16
  4. Step 4: Simplify right side
    7,109.80x = 48,091,003.05
  5. Step 5: Solve for x
    x = 48,091,003.05/7,109.80
  6. Step 6: Final answer
    x = 6,764.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.