Home / 20,429.25-30,645.64-5,638.17

Finding the Fourth Proportional to 20,429.25, 30,645.64 and 5,638.17

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Solution

The fourth proportional to 20,429.25, 30,645.64 and 5,638.17 is: 8,457.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,429.25 : 30,645.64 = 5,638.17 : x
  2. Step 2: Convert to fraction form
    20,429.25/30,645.64 = 5,638.17/x
  3. Step 3: Cross multiply
    20,429.25x = 30,645.64 × 5,638.17
  4. Step 4: Simplify right side
    20,429.25x = 172,785,221.28
  5. Step 5: Solve for x
    x = 172,785,221.28/20,429.25
  6. Step 6: Final answer
    x = 8,457.74

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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.