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Finding the Fourth Proportional to 7,909.65, 10,914.89 and 4,372.16

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Solution

The fourth proportional to 7,909.65, 10,914.89 and 4,372.16 is: 6,033.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,909.65 : 10,914.89 = 4,372.16 : x
  2. Step 2: Convert to fraction form
    7,909.65/10,914.89 = 4,372.16/x
  3. Step 3: Cross multiply
    7,909.65x = 10,914.89 × 4,372.16
  4. Step 4: Simplify right side
    7,909.65x = 47,721,569.03
  5. Step 5: Solve for x
    x = 47,721,569.03/7,909.65
  6. Step 6: Final answer
    x = 6,033.34

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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.