Home / 12,187.87-16,813.45-7,937.40

Finding the Fourth Proportional to 12,187.87, 16,813.45 and 7,937.40

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Solution

The fourth proportional to 12,187.87, 16,813.45 and 7,937.40 is: 10,949.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,187.87 : 16,813.45 = 7,937.40 : x
  2. Step 2: Convert to fraction form
    12,187.87/16,813.45 = 7,937.40/x
  3. Step 3: Cross multiply
    12,187.87x = 16,813.45 × 7,937.40
  4. Step 4: Simplify right side
    12,187.87x = 133,455,078.03
  5. Step 5: Solve for x
    x = 133,455,078.03/12,187.87
  6. Step 6: Final answer
    x = 10,949.83

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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.