Home / 20,989.06-31,483.65-8,509.32

Finding the Fourth Proportional to 20,989.06, 31,483.65 and 8,509.32

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Solution

The fourth proportional to 20,989.06, 31,483.65 and 8,509.32 is: 12,764.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.06 : 31,483.65 = 8,509.32 : x
  2. Step 2: Convert to fraction form
    20,989.06/31,483.65 = 8,509.32/x
  3. Step 3: Cross multiply
    20,989.06x = 31,483.65 × 8,509.32
  4. Step 4: Simplify right side
    20,989.06x = 267,904,452.62
  5. Step 5: Solve for x
    x = 267,904,452.62/20,989.06
  6. Step 6: Final answer
    x = 12,764.00

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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.