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Finding the Fourth Proportional to 18,677.64, 25,763.80 and 11,118.92

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Solution

The fourth proportional to 18,677.64, 25,763.80 and 11,118.92 is: 15,337.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,677.64 : 25,763.80 = 11,118.92 : x
  2. Step 2: Convert to fraction form
    18,677.64/25,763.80 = 11,118.92/x
  3. Step 3: Cross multiply
    18,677.64x = 25,763.80 × 11,118.92
  4. Step 4: Simplify right side
    18,677.64x = 286,465,631.10
  5. Step 5: Solve for x
    x = 286,465,631.10/18,677.64
  6. Step 6: Final answer
    x = 15,337.36

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Half scale
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Double scale
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Similar ratio
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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.