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Finding the Fourth Proportional to 18,521.78, 25,559.79 and 10,564.14

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Solution

The fourth proportional to 18,521.78, 25,559.79 and 10,564.14 is: 14,578.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,521.78 : 25,559.79 = 10,564.14 : x
  2. Step 2: Convert to fraction form
    18,521.78/25,559.79 = 10,564.14/x
  3. Step 3: Cross multiply
    18,521.78x = 25,559.79 × 10,564.14
  4. Step 4: Simplify right side
    18,521.78x = 270,017,175.65
  5. Step 5: Solve for x
    x = 270,017,175.65/18,521.78
  6. Step 6: Final answer
    x = 14,578.36

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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.