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Finding the Fourth Proportional to 25,644.70, 38,467.05 and 20,979.10

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Solution

The fourth proportional to 25,644.70, 38,467.05 and 20,979.10 is: 31,468.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,644.70 : 38,467.05 = 20,979.10 : x
  2. Step 2: Convert to fraction form
    25,644.70/38,467.05 = 20,979.10/x
  3. Step 3: Cross multiply
    25,644.70x = 38,467.05 × 20,979.10
  4. Step 4: Simplify right side
    25,644.70x = 807,004,088.66
  5. Step 5: Solve for x
    x = 807,004,088.66/25,644.70
  6. Step 6: Final answer
    x = 31,468.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.