Home / 30,638.28-42,270.06-20,034.12

Finding the Fourth Proportional to 30,638.28, 42,270.06 and 20,034.12

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Solution

The fourth proportional to 30,638.28, 42,270.06 and 20,034.12 is: 27,640.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,638.28 : 42,270.06 = 20,034.12 : x
  2. Step 2: Convert to fraction form
    30,638.28/42,270.06 = 20,034.12/x
  3. Step 3: Cross multiply
    30,638.28x = 42,270.06 × 20,034.12
  4. Step 4: Simplify right side
    30,638.28x = 846,843,454.45
  5. Step 5: Solve for x
    x = 846,843,454.45/30,638.28
  6. Step 6: Final answer
    x = 27,640.05

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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.