Home / 12,159.12-18,271.65-6,616.56

Finding the Fourth Proportional to 12,159.12, 18,271.65 and 6,616.56

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Solution

The fourth proportional to 12,159.12, 18,271.65 and 6,616.56 is: 9,942.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,159.12 : 18,271.65 = 6,616.56 : x
  2. Step 2: Convert to fraction form
    12,159.12/18,271.65 = 6,616.56/x
  3. Step 3: Cross multiply
    12,159.12x = 18,271.65 × 6,616.56
  4. Step 4: Simplify right side
    12,159.12x = 120,895,468.52
  5. Step 5: Solve for x
    x = 120,895,468.52/12,159.12
  6. Step 6: Final answer
    x = 9,942.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.