Home / 12,965.20-19,436.40-7,687.20

Finding the Fourth Proportional to 12,965.20, 19,436.40 and 7,687.20

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Solution

The fourth proportional to 12,965.20, 19,436.40 and 7,687.20 is: 11,524.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,965.20 : 19,436.40 = 7,687.20 : x
  2. Step 2: Convert to fraction form
    12,965.20/19,436.40 = 7,687.20/x
  3. Step 3: Cross multiply
    12,965.20x = 19,436.40 × 7,687.20
  4. Step 4: Simplify right side
    12,965.20x = 149,411,494.08
  5. Step 5: Solve for x
    x = 149,411,494.08/12,965.20
  6. Step 6: Final answer
    x = 11,524.04

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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.