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Finding the Fourth Proportional to 20,079.70, 30,119.55 and 16,434.70

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Solution

The fourth proportional to 20,079.70, 30,119.55 and 16,434.70 is: 24,652.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,079.70 : 30,119.55 = 16,434.70 : x
  2. Step 2: Convert to fraction form
    20,079.70/30,119.55 = 16,434.70/x
  3. Step 3: Cross multiply
    20,079.70x = 30,119.55 × 16,434.70
  4. Step 4: Simplify right side
    20,079.70x = 495,005,768.39
  5. Step 5: Solve for x
    x = 495,005,768.39/20,079.70
  6. Step 6: Final answer
    x = 24,652.05

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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.