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Finding the Fourth Proportional to 7,090.21, 9,781.86 and 7,079.27

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Solution

The fourth proportional to 7,090.21, 9,781.86 and 7,079.27 is: 9,766.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,090.21 : 9,781.86 = 7,079.27 : x
  2. Step 2: Convert to fraction form
    7,090.21/9,781.86 = 7,079.27/x
  3. Step 3: Cross multiply
    7,090.21x = 9,781.86 × 7,079.27
  4. Step 4: Simplify right side
    7,090.21x = 69,248,470.20
  5. Step 5: Solve for x
    x = 69,248,470.20/7,090.21
  6. Step 6: Final answer
    x = 9,766.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.