Home / 20,445.39-30,671.64-7,972.20

Finding the Fourth Proportional to 20,445.39, 30,671.64 and 7,972.20

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Solution

The fourth proportional to 20,445.39, 30,671.64 and 7,972.20 is: 11,959.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,445.39 : 30,671.64 = 7,972.20 : x
  2. Step 2: Convert to fraction form
    20,445.39/30,671.64 = 7,972.20/x
  3. Step 3: Cross multiply
    20,445.39x = 30,671.64 × 7,972.20
  4. Step 4: Simplify right side
    20,445.39x = 244,520,448.41
  5. Step 5: Solve for x
    x = 244,520,448.41/20,445.39
  6. Step 6: Final answer
    x = 11,959.69

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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.