Home / 12,815.36-17,685.33-7,150.64

Finding the Fourth Proportional to 12,815.36, 17,685.33 and 7,150.64

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Solution

The fourth proportional to 12,815.36, 17,685.33 and 7,150.64 is: 9,867.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,815.36 : 17,685.33 = 7,150.64 : x
  2. Step 2: Convert to fraction form
    12,815.36/17,685.33 = 7,150.64/x
  3. Step 3: Cross multiply
    12,815.36x = 17,685.33 × 7,150.64
  4. Step 4: Simplify right side
    12,815.36x = 126,461,428.11
  5. Step 5: Solve for x
    x = 126,461,428.11/12,815.36
  6. Step 6: Final answer
    x = 9,867.96

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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.