Home / 30,351.28-41,869.90-20,282.20

Finding the Fourth Proportional to 30,351.28, 41,869.90 and 20,282.20

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Solution

The fourth proportional to 30,351.28, 41,869.90 and 20,282.20 is: 27,979.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,351.28 : 41,869.90 = 20,282.20 : x
  2. Step 2: Convert to fraction form
    30,351.28/41,869.90 = 20,282.20/x
  3. Step 3: Cross multiply
    30,351.28x = 41,869.90 × 20,282.20
  4. Step 4: Simplify right side
    30,351.28x = 849,213,685.78
  5. Step 5: Solve for x
    x = 849,213,685.78/30,351.28
  6. Step 6: Final answer
    x = 27,979.50

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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.