Home / 13,155.64-18,154.82-7,187.38

Finding the Fourth Proportional to 13,155.64, 18,154.82 and 7,187.38

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Solution

The fourth proportional to 13,155.64, 18,154.82 and 7,187.38 is: 9,918.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,155.64 : 18,154.82 = 7,187.38 : x
  2. Step 2: Convert to fraction form
    13,155.64/18,154.82 = 7,187.38/x
  3. Step 3: Cross multiply
    13,155.64x = 18,154.82 × 7,187.38
  4. Step 4: Simplify right side
    13,155.64x = 130,485,590.17
  5. Step 5: Solve for x
    x = 130,485,590.17/13,155.64
  6. Step 6: Final answer
    x = 9,918.60

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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.