Home / 20,657.31-30,980.43-8,967.75

Finding the Fourth Proportional to 20,657.31, 30,980.43 and 8,967.75

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Solution

The fourth proportional to 20,657.31, 30,980.43 and 8,967.75 is: 13,449.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,657.31 : 30,980.43 = 8,967.75 : x
  2. Step 2: Convert to fraction form
    20,657.31/30,980.43 = 8,967.75/x
  3. Step 3: Cross multiply
    20,657.31x = 30,980.43 × 8,967.75
  4. Step 4: Simplify right side
    20,657.31x = 277,824,751.13
  5. Step 5: Solve for x
    x = 277,824,751.13/20,657.31
  6. Step 6: Final answer
    x = 13,449.22

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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.