Home / 20,666.02-30,988.86-6,622.75

Finding the Fourth Proportional to 20,666.02, 30,988.86 and 6,622.75

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Solution

The fourth proportional to 20,666.02, 30,988.86 and 6,622.75 is: 9,930.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.02 : 30,988.86 = 6,622.75 : x
  2. Step 2: Convert to fraction form
    20,666.02/30,988.86 = 6,622.75/x
  3. Step 3: Cross multiply
    20,666.02x = 30,988.86 × 6,622.75
  4. Step 4: Simplify right side
    20,666.02x = 205,231,472.57
  5. Step 5: Solve for x
    x = 205,231,472.57/20,666.02
  6. Step 6: Final answer
    x = 9,930.87

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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.