Home / 12,805.20-17,672.52-9,656.40

Finding the Fourth Proportional to 12,805.20, 17,672.52 and 9,656.40

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Solution

The fourth proportional to 12,805.20, 17,672.52 and 9,656.40 is: 13,326.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,805.20 : 17,672.52 = 9,656.40 : x
  2. Step 2: Convert to fraction form
    12,805.20/17,672.52 = 9,656.40/x
  3. Step 3: Cross multiply
    12,805.20x = 17,672.52 × 9,656.40
  4. Step 4: Simplify right side
    12,805.20x = 170,652,922.13
  5. Step 5: Solve for x
    x = 170,652,922.13/12,805.20
  6. Step 6: Final answer
    x = 13,326.85

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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.