Home / 12,255.29-16,913.55-7,221.08

Finding the Fourth Proportional to 12,255.29, 16,913.55 and 7,221.08

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Solution

The fourth proportional to 12,255.29, 16,913.55 and 7,221.08 is: 9,965.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,255.29 : 16,913.55 = 7,221.08 : x
  2. Step 2: Convert to fraction form
    12,255.29/16,913.55 = 7,221.08/x
  3. Step 3: Cross multiply
    12,255.29x = 16,913.55 × 7,221.08
  4. Step 4: Simplify right side
    12,255.29x = 122,134,097.63
  5. Step 5: Solve for x
    x = 122,134,097.63/12,255.29
  6. Step 6: Final answer
    x = 9,965.83

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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.