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Finding the Fourth Proportional to 13,159.30, 18,159.86 and 7,191.07

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Solution

The fourth proportional to 13,159.30, 18,159.86 and 7,191.07 is: 9,923.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,159.30 : 18,159.86 = 7,191.07 : x
  2. Step 2: Convert to fraction form
    13,159.30/18,159.86 = 7,191.07/x
  3. Step 3: Cross multiply
    13,159.30x = 18,159.86 × 7,191.07
  4. Step 4: Simplify right side
    13,159.30x = 130,588,733.65
  5. Step 5: Solve for x
    x = 130,588,733.65/13,159.30
  6. Step 6: Final answer
    x = 9,923.68

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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.