Home / 20,665.02-30,987.36-6,621.75

Finding the Fourth Proportional to 20,665.02, 30,987.36 and 6,621.75

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Solution

The fourth proportional to 20,665.02, 30,987.36 and 6,621.75 is: 9,929.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,665.02 : 30,987.36 = 6,621.75 : x
  2. Step 2: Convert to fraction form
    20,665.02/30,987.36 = 6,621.75/x
  3. Step 3: Cross multiply
    20,665.02x = 30,987.36 × 6,621.75
  4. Step 4: Simplify right side
    20,665.02x = 205,190,551.08
  5. Step 5: Solve for x
    x = 205,190,551.08/20,665.02
  6. Step 6: Final answer
    x = 9,929.36

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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.