Home / 20,670.27-30,999.93-8,980.75

Finding the Fourth Proportional to 20,670.27, 30,999.93 and 8,980.75

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Solution

The fourth proportional to 20,670.27, 30,999.93 and 8,980.75 is: 13,468.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,670.27 : 30,999.93 = 8,980.75 : x
  2. Step 2: Convert to fraction form
    20,670.27/30,999.93 = 8,980.75/x
  3. Step 3: Cross multiply
    20,670.27x = 30,999.93 × 8,980.75
  4. Step 4: Simplify right side
    20,670.27x = 278,402,621.35
  5. Step 5: Solve for x
    x = 278,402,621.35/20,670.27
  6. Step 6: Final answer
    x = 13,468.75

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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.