Home / 20,411.59-30,612.72-5,621.80

Finding the Fourth Proportional to 20,411.59, 30,612.72 and 5,621.80

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Solution

The fourth proportional to 20,411.59, 30,612.72 and 5,621.80 is: 8,431.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,411.59 : 30,612.72 = 5,621.80 : x
  2. Step 2: Convert to fraction form
    20,411.59/30,612.72 = 5,621.80/x
  3. Step 3: Cross multiply
    20,411.59x = 30,612.72 × 5,621.80
  4. Step 4: Simplify right side
    20,411.59x = 172,098,408.12
  5. Step 5: Solve for x
    x = 172,098,408.12/20,411.59
  6. Step 6: Final answer
    x = 8,431.41

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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.