Home / 20,308.90-30,478.31-9,635.30

Finding the Fourth Proportional to 20,308.90, 30,478.31 and 9,635.30

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Solution

The fourth proportional to 20,308.90, 30,478.31 and 9,635.30 is: 14,460.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,308.90 : 30,478.31 = 9,635.30 : x
  2. Step 2: Convert to fraction form
    20,308.90/30,478.31 = 9,635.30/x
  3. Step 3: Cross multiply
    20,308.90x = 30,478.31 × 9,635.30
  4. Step 4: Simplify right side
    20,308.90x = 293,667,565.13
  5. Step 5: Solve for x
    x = 293,667,565.13/20,308.90
  6. Step 6: Final answer
    x = 14,460.04

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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.