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Finding the Fourth Proportional to 13,159.43, 18,159.23 and 7,189.91

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Solution

The fourth proportional to 13,159.43, 18,159.23 and 7,189.91 is: 9,921.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,159.43 : 18,159.23 = 7,189.91 : x
  2. Step 2: Convert to fraction form
    13,159.43/18,159.23 = 7,189.91/x
  3. Step 3: Cross multiply
    13,159.43x = 18,159.23 × 7,189.91
  4. Step 4: Simplify right side
    13,159.43x = 130,563,156.55
  5. Step 5: Solve for x
    x = 130,563,156.55/13,159.43
  6. Step 6: Final answer
    x = 9,921.65

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.