Home / 12,186.08-16,815.12-7,151.52

Finding the Fourth Proportional to 12,186.08, 16,815.12 and 7,151.52

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Solution

The fourth proportional to 12,186.08, 16,815.12 and 7,151.52 is: 9,868.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,186.08 : 16,815.12 = 7,151.52 : x
  2. Step 2: Convert to fraction form
    12,186.08/16,815.12 = 7,151.52/x
  3. Step 3: Cross multiply
    12,186.08x = 16,815.12 × 7,151.52
  4. Step 4: Simplify right side
    12,186.08x = 120,253,666.98
  5. Step 5: Solve for x
    x = 120,253,666.98/12,186.08
  6. Step 6: Final answer
    x = 9,868.12

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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.