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Finding the Fourth Proportional to 7,885.76, 11,836.85 and 5,808.11

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Solution

The fourth proportional to 7,885.76, 11,836.85 and 5,808.11 is: 8,718.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,885.76 : 11,836.85 = 5,808.11 : x
  2. Step 2: Convert to fraction form
    7,885.76/11,836.85 = 5,808.11/x
  3. Step 3: Cross multiply
    7,885.76x = 11,836.85 × 5,808.11
  4. Step 4: Simplify right side
    7,885.76x = 68,749,697.81
  5. Step 5: Solve for x
    x = 68,749,697.81/7,885.76
  6. Step 6: Final answer
    x = 8,718.21

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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.