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Finding the Fourth Proportional to 20,920.20, 29,346.60 and 20,920.20

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Solution

The fourth proportional to 20,920.20, 29,346.60 and 20,920.20 is: 29,346.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,920.20 : 29,346.60 = 20,920.20 : x
  2. Step 2: Convert to fraction form
    20,920.20/29,346.60 = 20,920.20/x
  3. Step 3: Cross multiply
    20,920.20x = 29,346.60 × 20,920.20
  4. Step 4: Simplify right side
    20,920.20x = 613,936,741.32
  5. Step 5: Solve for x
    x = 613,936,741.32/20,920.20
  6. Step 6: Final answer
    x = 29,346.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.