Home / 13,155.43-18,154.85-7,187.42

Finding the Fourth Proportional to 13,155.43, 18,154.85 and 7,187.42

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Solution

The fourth proportional to 13,155.43, 18,154.85 and 7,187.42 is: 9,918.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155.43 : 18,154.85 = 7,187.42 : x
  2. Step 2: Convert to fraction form
    13,155.43/18,154.85 = 7,187.42/x
  3. Step 3: Cross multiply
    13,155.43x = 18,154.85 × 7,187.42
  4. Step 4: Simplify right side
    13,155.43x = 130,486,531.99
  5. Step 5: Solve for x
    x = 130,486,531.99/13,155.43
  6. Step 6: Final answer
    x = 9,918.83

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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.