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Finding the Fourth Proportional to 13,137.18, 18,129.18 and 7,168.89

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Solution

The fourth proportional to 13,137.18, 18,129.18 and 7,168.89 is: 9,893.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.18 : 18,129.18 = 7,168.89 : x
  2. Step 2: Convert to fraction form
    13,137.18/18,129.18 = 7,168.89/x
  3. Step 3: Cross multiply
    13,137.18x = 18,129.18 × 7,168.89
  4. Step 4: Simplify right side
    13,137.18x = 129,966,097.21
  5. Step 5: Solve for x
    x = 129,966,097.21/13,137.18
  6. Step 6: Final answer
    x = 9,893.00

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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.