Home / 20,665.47-31,000.25-6,621.96

Finding the Fourth Proportional to 20,665.47, 31,000.25 and 6,621.96

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Solution

The fourth proportional to 20,665.47, 31,000.25 and 6,621.96 is: 9,933.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,665.47 : 31,000.25 = 6,621.96 : x
  2. Step 2: Convert to fraction form
    20,665.47/31,000.25 = 6,621.96/x
  3. Step 3: Cross multiply
    20,665.47x = 31,000.25 × 6,621.96
  4. Step 4: Simplify right side
    20,665.47x = 205,282,415.49
  5. Step 5: Solve for x
    x = 205,282,415.49/20,665.47
  6. Step 6: Final answer
    x = 9,933.60

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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.