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Finding the Fourth Proportional to 18,663.72, 25,755.93 and 10,280.22

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Solution

The fourth proportional to 18,663.72, 25,755.93 and 10,280.22 is: 14,186.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,663.72 : 25,755.93 = 10,280.22 : x
  2. Step 2: Convert to fraction form
    18,663.72/25,755.93 = 10,280.22/x
  3. Step 3: Cross multiply
    18,663.72x = 25,755.93 × 10,280.22
  4. Step 4: Simplify right side
    18,663.72x = 264,776,530.12
  5. Step 5: Solve for x
    x = 264,776,530.12/18,663.72
  6. Step 6: Final answer
    x = 14,186.70

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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.