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Finding the Fourth Proportional to 13,159.08, 18,159.46 and 7,191.08

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Solution

The fourth proportional to 13,159.08, 18,159.46 and 7,191.08 is: 9,923.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,159.08 : 18,159.46 = 7,191.08 : x
  2. Step 2: Convert to fraction form
    13,159.08/18,159.46 = 7,191.08/x
  3. Step 3: Cross multiply
    13,159.08x = 18,159.46 × 7,191.08
  4. Step 4: Simplify right side
    13,159.08x = 130,586,129.62
  5. Step 5: Solve for x
    x = 130,586,129.62/13,159.08
  6. Step 6: Final answer
    x = 9,923.65

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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.