Home / 30,907.43-42,640.18-20,164.94

Finding the Fourth Proportional to 30,907.43, 42,640.18 and 20,164.94

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Solution

The fourth proportional to 30,907.43, 42,640.18 and 20,164.94 is: 27,819.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,907.43 : 42,640.18 = 20,164.94 : x
  2. Step 2: Convert to fraction form
    30,907.43/42,640.18 = 20,164.94/x
  3. Step 3: Cross multiply
    30,907.43x = 42,640.18 × 20,164.94
  4. Step 4: Simplify right side
    30,907.43x = 859,836,671.29
  5. Step 5: Solve for x
    x = 859,836,671.29/30,907.43
  6. Step 6: Final answer
    x = 27,819.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.