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Finding the Fourth Proportional to 8,813.86, 12,156.04 and 7,749.35

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Solution

The fourth proportional to 8,813.86, 12,156.04 and 7,749.35 is: 10,687.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,813.86 : 12,156.04 = 7,749.35 : x
  2. Step 2: Convert to fraction form
    8,813.86/12,156.04 = 7,749.35/x
  3. Step 3: Cross multiply
    8,813.86x = 12,156.04 × 7,749.35
  4. Step 4: Simplify right side
    8,813.86x = 94,201,408.57
  5. Step 5: Solve for x
    x = 94,201,408.57/8,813.86
  6. Step 6: Final answer
    x = 10,687.87

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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.