Home / 12,915.27-19,356.66-6,991.92

Finding the Fourth Proportional to 12,915.27, 19,356.66 and 6,991.92

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Solution

The fourth proportional to 12,915.27, 19,356.66 and 6,991.92 is: 10,479.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,915.27 : 19,356.66 = 6,991.92 : x
  2. Step 2: Convert to fraction form
    12,915.27/19,356.66 = 6,991.92/x
  3. Step 3: Cross multiply
    12,915.27x = 19,356.66 × 6,991.92
  4. Step 4: Simplify right side
    12,915.27x = 135,340,218.19
  5. Step 5: Solve for x
    x = 135,340,218.19/12,915.27
  6. Step 6: Final answer
    x = 10,479.09

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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.