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Finding the Fourth Proportional to 13,155.87, 18,154.44 and 7,186.44

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Solution

The fourth proportional to 13,155.87, 18,154.44 and 7,186.44 is: 9,916.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155.87 : 18,154.44 = 7,186.44 : x
  2. Step 2: Convert to fraction form
    13,155.87/18,154.44 = 7,186.44/x
  3. Step 3: Cross multiply
    13,155.87x = 18,154.44 × 7,186.44
  4. Step 4: Simplify right side
    13,155.87x = 130,465,793.79
  5. Step 5: Solve for x
    x = 130,465,793.79/13,155.87
  6. Step 6: Final answer
    x = 9,916.93

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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.