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Finding the Fourth Proportional to 20,565.70, 30,913.35 and 20,176.90

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Solution

The fourth proportional to 20,565.70, 30,913.35 and 20,176.90 is: 30,328.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,565.70 : 30,913.35 = 20,176.90 : x
  2. Step 2: Convert to fraction form
    20,565.70/30,913.35 = 20,176.90/x
  3. Step 3: Cross multiply
    20,565.70x = 30,913.35 × 20,176.90
  4. Step 4: Simplify right side
    20,565.70x = 623,735,571.62
  5. Step 5: Solve for x
    x = 623,735,571.62/20,565.70
  6. Step 6: Final answer
    x = 30,328.92

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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.