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Finding the Fourth Proportional to 8,647.64, 11,932.08 and 5,291.18

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Solution

The fourth proportional to 8,647.64, 11,932.08 and 5,291.18 is: 7,300.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,647.64 : 11,932.08 = 5,291.18 : x
  2. Step 2: Convert to fraction form
    8,647.64/11,932.08 = 5,291.18/x
  3. Step 3: Cross multiply
    8,647.64x = 11,932.08 × 5,291.18
  4. Step 4: Simplify right side
    8,647.64x = 63,134,783.05
  5. Step 5: Solve for x
    x = 63,134,783.05/8,647.64
  6. Step 6: Final answer
    x = 7,300.81

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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.