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Finding the Fourth Proportional to 18,664.70, 25,757.28 and 10,281.20

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Solution

The fourth proportional to 18,664.70, 25,757.28 and 10,281.20 is: 14,188.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,664.70 : 25,757.28 = 10,281.20 : x
  2. Step 2: Convert to fraction form
    18,664.70/25,757.28 = 10,281.20/x
  3. Step 3: Cross multiply
    18,664.70x = 25,757.28 × 10,281.20
  4. Step 4: Simplify right side
    18,664.70x = 264,815,618.35
  5. Step 5: Solve for x
    x = 264,815,618.35/18,664.70
  6. Step 6: Final answer
    x = 14,188.05

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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.