Home / 20,419.28-30,587.90-9,310.69

Finding the Fourth Proportional to 20,419.28, 30,587.90 and 9,310.69

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Solution

The fourth proportional to 20,419.28, 30,587.90 and 9,310.69 is: 13,947.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,419.28 : 30,587.90 = 9,310.69 : x
  2. Step 2: Convert to fraction form
    20,419.28/30,587.90 = 9,310.69/x
  3. Step 3: Cross multiply
    20,419.28x = 30,587.90 × 9,310.69
  4. Step 4: Simplify right side
    20,419.28x = 284,794,301.71
  5. Step 5: Solve for x
    x = 284,794,301.71/20,419.28
  6. Step 6: Final answer
    x = 13,947.32

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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.