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Finding the Fourth Proportional to 25,809.40, 38,714.10 and 15,959.80

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Solution

The fourth proportional to 25,809.40, 38,714.10 and 15,959.80 is: 23,939.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,809.40 : 38,714.10 = 15,959.80 : x
  2. Step 2: Convert to fraction form
    25,809.40/38,714.10 = 15,959.80/x
  3. Step 3: Cross multiply
    25,809.40x = 38,714.10 × 15,959.80
  4. Step 4: Simplify right side
    25,809.40x = 617,869,293.18
  5. Step 5: Solve for x
    x = 617,869,293.18/25,809.40
  6. Step 6: Final answer
    x = 23,939.70

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.