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Finding the Fourth Proportional to 20,535.20, 30,802.71 and 8,046.40

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Solution

The fourth proportional to 20,535.20, 30,802.71 and 8,046.40 is: 12,069.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,535.20 : 30,802.71 = 8,046.40 : x
  2. Step 2: Convert to fraction form
    20,535.20/30,802.71 = 8,046.40/x
  3. Step 3: Cross multiply
    20,535.20x = 30,802.71 × 8,046.40
  4. Step 4: Simplify right side
    20,535.20x = 247,850,925.74
  5. Step 5: Solve for x
    x = 247,850,925.74/20,535.20
  6. Step 6: Final answer
    x = 12,069.56

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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.