Home / 20,429.22-30,643.20-5,639.04

Finding the Fourth Proportional to 20,429.22, 30,643.20 and 5,639.04

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Solution

The fourth proportional to 20,429.22, 30,643.20 and 5,639.04 is: 8,458.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,429.22 : 30,643.20 = 5,639.04 : x
  2. Step 2: Convert to fraction form
    20,429.22/30,643.20 = 5,639.04/x
  3. Step 3: Cross multiply
    20,429.22x = 30,643.20 × 5,639.04
  4. Step 4: Simplify right side
    20,429.22x = 172,798,230.53
  5. Step 5: Solve for x
    x = 172,798,230.53/20,429.22
  6. Step 6: Final answer
    x = 8,458.39

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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.