Home / 18,718.12-25,819.62-11,159.48

Finding the Fourth Proportional to 18,718.12, 25,819.62 and 11,159.48

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Solution

The fourth proportional to 18,718.12, 25,819.62 and 11,159.48 is: 15,393.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,718.12 : 25,819.62 = 11,159.48 : x
  2. Step 2: Convert to fraction form
    18,718.12/25,819.62 = 11,159.48/x
  3. Step 3: Cross multiply
    18,718.12x = 25,819.62 × 11,159.48
  4. Step 4: Simplify right side
    18,718.12x = 288,133,533.00
  5. Step 5: Solve for x
    x = 288,133,533.00/18,718.12
  6. Step 6: Final answer
    x = 15,393.29

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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.