Home / 20,909.64-31,344.66-7,753.08

Finding the Fourth Proportional to 20,909.64, 31,344.66 and 7,753.08

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Solution

The fourth proportional to 20,909.64, 31,344.66 and 7,753.08 is: 11,622.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.64 : 31,344.66 = 7,753.08 : x
  2. Step 2: Convert to fraction form
    20,909.64/31,344.66 = 7,753.08/x
  3. Step 3: Cross multiply
    20,909.64x = 31,344.66 × 7,753.08
  4. Step 4: Simplify right side
    20,909.64x = 243,017,656.55
  5. Step 5: Solve for x
    x = 243,017,656.55/20,909.64
  6. Step 6: Final answer
    x = 11,622.28

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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.