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Finding the Fourth Proportional to 8,368.92, 12,493.35 and 7,785.72

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Solution

The fourth proportional to 8,368.92, 12,493.35 and 7,785.72 is: 11,622.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,368.92 : 12,493.35 = 7,785.72 : x
  2. Step 2: Convert to fraction form
    8,368.92/12,493.35 = 7,785.72/x
  3. Step 3: Cross multiply
    8,368.92x = 12,493.35 × 7,785.72
  4. Step 4: Simplify right side
    8,368.92x = 97,269,724.96
  5. Step 5: Solve for x
    x = 97,269,724.96/8,368.92
  6. Step 6: Final answer
    x = 11,622.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.