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Finding the Fourth Proportional to 8,298.73, 12,438.07 and 4,139.78

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Solution

The fourth proportional to 8,298.73, 12,438.07 and 4,139.78 is: 6,204.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,298.73 : 12,438.07 = 4,139.78 : x
  2. Step 2: Convert to fraction form
    8,298.73/12,438.07 = 4,139.78/x
  3. Step 3: Cross multiply
    8,298.73x = 12,438.07 × 4,139.78
  4. Step 4: Simplify right side
    8,298.73x = 51,490,894.17
  5. Step 5: Solve for x
    x = 51,490,894.17/8,298.73
  6. Step 6: Final answer
    x = 6,204.67

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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.