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Finding the Fourth Proportional to 18,643.77, 25,728.95 and 10,146.44

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Solution

The fourth proportional to 18,643.77, 25,728.95 and 10,146.44 is: 14,002.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,643.77 : 25,728.95 = 10,146.44 : x
  2. Step 2: Convert to fraction form
    18,643.77/25,728.95 = 10,146.44/x
  3. Step 3: Cross multiply
    18,643.77x = 25,728.95 × 10,146.44
  4. Step 4: Simplify right side
    18,643.77x = 261,057,299.08
  5. Step 5: Solve for x
    x = 261,057,299.08/18,643.77
  6. Step 6: Final answer
    x = 14,002.39

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Half scale
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Double scale
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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.