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Finding the Fourth Proportional to 18,718.22, 25,830.03 and 10,218.65

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Solution

The fourth proportional to 18,718.22, 25,830.03 and 10,218.65 is: 14,101.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,718.22 : 25,830.03 = 10,218.65 : x
  2. Step 2: Convert to fraction form
    18,718.22/25,830.03 = 10,218.65/x
  3. Step 3: Cross multiply
    18,718.22x = 25,830.03 × 10,218.65
  4. Step 4: Simplify right side
    18,718.22x = 263,948,036.06
  5. Step 5: Solve for x
    x = 263,948,036.06/18,718.22
  6. Step 6: Final answer
    x = 14,101.13

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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.