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Finding the Fourth Proportional to 18,661.78, 25,753.26 and 10,278.28

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Solution

The fourth proportional to 18,661.78, 25,753.26 and 10,278.28 is: 14,184.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,661.78 : 25,753.26 = 10,278.28 : x
  2. Step 2: Convert to fraction form
    18,661.78/25,753.26 = 10,278.28/x
  3. Step 3: Cross multiply
    18,661.78x = 25,753.26 × 10,278.28
  4. Step 4: Simplify right side
    18,661.78x = 264,699,230.11
  5. Step 5: Solve for x
    x = 264,699,230.11/18,661.78
  6. Step 6: Final answer
    x = 14,184.03

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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.