Home / 12,837.28-19,218.72-7,891.92

Finding the Fourth Proportional to 12,837.28, 19,218.72 and 7,891.92

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Solution

The fourth proportional to 12,837.28, 19,218.72 and 7,891.92 is: 11,815.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,837.28 : 19,218.72 = 7,891.92 : x
  2. Step 2: Convert to fraction form
    12,837.28/19,218.72 = 7,891.92/x
  3. Step 3: Cross multiply
    12,837.28x = 19,218.72 × 7,891.92
  4. Step 4: Simplify right side
    12,837.28x = 151,672,600.74
  5. Step 5: Solve for x
    x = 151,672,600.74/12,837.28
  6. Step 6: Final answer
    x = 11,815.01

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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.