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Finding the Fourth Proportional to 20,776.72, 31,165.08 and 6,925.72

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Solution

The fourth proportional to 20,776.72, 31,165.08 and 6,925.72 is: 10,388.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,776.72 : 31,165.08 = 6,925.72 : x
  2. Step 2: Convert to fraction form
    20,776.72/31,165.08 = 6,925.72/x
  3. Step 3: Cross multiply
    20,776.72x = 31,165.08 × 6,925.72
  4. Step 4: Simplify right side
    20,776.72x = 215,840,617.86
  5. Step 5: Solve for x
    x = 215,840,617.86/20,776.72
  6. Step 6: Final answer
    x = 10,388.58

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1.5x scale

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.