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Finding the Fourth Proportional to 28,920.59, 43,358.90 and 20,012.25

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Solution

The fourth proportional to 28,920.59, 43,358.90 and 20,012.25 is: 30,003.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,920.59 : 43,358.90 = 20,012.25 : x
  2. Step 2: Convert to fraction form
    28,920.59/43,358.90 = 20,012.25/x
  3. Step 3: Cross multiply
    28,920.59x = 43,358.90 × 20,012.25
  4. Step 4: Simplify right side
    28,920.59x = 867,708,965.17
  5. Step 5: Solve for x
    x = 867,708,965.17/28,920.59
  6. Step 6: Final answer
    x = 30,003.15

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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.