Home / 20,258.28-30,387.15-10,392.21

Finding the Fourth Proportional to 20,258.28, 30,387.15 and 10,392.21

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Solution

The fourth proportional to 20,258.28, 30,387.15 and 10,392.21 is: 15,588.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,258.28 : 30,387.15 = 10,392.21 : x
  2. Step 2: Convert to fraction form
    20,258.28/30,387.15 = 10,392.21/x
  3. Step 3: Cross multiply
    20,258.28x = 30,387.15 × 10,392.21
  4. Step 4: Simplify right side
    20,258.28x = 315,789,644.10
  5. Step 5: Solve for x
    x = 315,789,644.10/20,258.28
  6. Step 6: Final answer
    x = 15,588.18

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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.