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Finding the Fourth Proportional to 18,570.65, 25,625.89 and 10,913.11

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Solution

The fourth proportional to 18,570.65, 25,625.89 and 10,913.11 is: 15,059.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,570.65 : 25,625.89 = 10,913.11 : x
  2. Step 2: Convert to fraction form
    18,570.65/25,625.89 = 10,913.11/x
  3. Step 3: Cross multiply
    18,570.65x = 25,625.89 × 10,913.11
  4. Step 4: Simplify right side
    18,570.65x = 279,658,156.42
  5. Step 5: Solve for x
    x = 279,658,156.42/18,570.65
  6. Step 6: Final answer
    x = 15,059.15

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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.