Home / 18,918.65-26,107.49-10,420.61

Finding the Fourth Proportional to 18,918.65, 26,107.49 and 10,420.61

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Solution

The fourth proportional to 18,918.65, 26,107.49 and 10,420.61 is: 14,380.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,918.65 : 26,107.49 = 10,420.61 : x
  2. Step 2: Convert to fraction form
    18,918.65/26,107.49 = 10,420.61/x
  3. Step 3: Cross multiply
    18,918.65x = 26,107.49 × 10,420.61
  4. Step 4: Simplify right side
    18,918.65x = 272,055,788.73
  5. Step 5: Solve for x
    x = 272,055,788.73/18,918.65
  6. Step 6: Final answer
    x = 14,380.30

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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.