Home / 13,873.12-19,145.28-8,287.36

Finding the Fourth Proportional to 13,873.12, 19,145.28 and 8,287.36

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Solution

The fourth proportional to 13,873.12, 19,145.28 and 8,287.36 is: 11,436.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,873.12 : 19,145.28 = 8,287.36 : x
  2. Step 2: Convert to fraction form
    13,873.12/19,145.28 = 8,287.36/x
  3. Step 3: Cross multiply
    13,873.12x = 19,145.28 × 8,287.36
  4. Step 4: Simplify right side
    13,873.12x = 158,663,827.66
  5. Step 5: Solve for x
    x = 158,663,827.66/13,873.12
  6. Step 6: Final answer
    x = 11,436.78

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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.