Home / 12,778.28-17,633.58-7,112.84

Finding the Fourth Proportional to 12,778.28, 17,633.58 and 7,112.84

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Solution

The fourth proportional to 12,778.28, 17,633.58 and 7,112.84 is: 9,815.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,778.28 : 17,633.58 = 7,112.84 : x
  2. Step 2: Convert to fraction form
    12,778.28/17,633.58 = 7,112.84/x
  3. Step 3: Cross multiply
    12,778.28x = 17,633.58 × 7,112.84
  4. Step 4: Simplify right side
    12,778.28x = 125,424,833.17
  5. Step 5: Solve for x
    x = 125,424,833.17/12,778.28
  6. Step 6: Final answer
    x = 9,815.47

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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.