Home / 13,872.36-19,145.88-7,904.61

Finding the Fourth Proportional to 13,872.36, 19,145.88 and 7,904.61

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Solution

The fourth proportional to 13,872.36, 19,145.88 and 7,904.61 is: 10,909.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,872.36 : 19,145.88 = 7,904.61 : x
  2. Step 2: Convert to fraction form
    13,872.36/19,145.88 = 7,904.61/x
  3. Step 3: Cross multiply
    13,872.36x = 19,145.88 × 7,904.61
  4. Step 4: Simplify right side
    13,872.36x = 151,340,714.51
  5. Step 5: Solve for x
    x = 151,340,714.51/13,872.36
  6. Step 6: Final answer
    x = 10,909.51

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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.