Home / 12,815.70-17,685.30-7,150.47

Finding the Fourth Proportional to 12,815.70, 17,685.30 and 7,150.47

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Solution

The fourth proportional to 12,815.70, 17,685.30 and 7,150.47 is: 9,867.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,815.70 : 17,685.30 = 7,150.47 : x
  2. Step 2: Convert to fraction form
    12,815.70/17,685.30 = 7,150.47/x
  3. Step 3: Cross multiply
    12,815.70x = 17,685.30 × 7,150.47
  4. Step 4: Simplify right side
    12,815.70x = 126,458,207.09
  5. Step 5: Solve for x
    x = 126,458,207.09/12,815.70
  6. Step 6: Final answer
    x = 9,867.44

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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.