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Finding the Fourth Proportional to 8,045.60, 12,082.80 and 7,786.40

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Solution

The fourth proportional to 8,045.60, 12,082.80 and 7,786.40 is: 11,693.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,045.60 : 12,082.80 = 7,786.40 : x
  2. Step 2: Convert to fraction form
    8,045.60/12,082.80 = 7,786.40/x
  3. Step 3: Cross multiply
    8,045.60x = 12,082.80 × 7,786.40
  4. Step 4: Simplify right side
    8,045.60x = 94,081,513.92
  5. Step 5: Solve for x
    x = 94,081,513.92/8,045.60
  6. Step 6: Final answer
    x = 11,693.54

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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.