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Finding the Fourth Proportional to 8,486.70, 11,711.43 and 4,902.30

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Solution

The fourth proportional to 8,486.70, 11,711.43 and 4,902.30 is: 6,765.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,486.70 : 11,711.43 = 4,902.30 : x
  2. Step 2: Convert to fraction form
    8,486.70/11,711.43 = 4,902.30/x
  3. Step 3: Cross multiply
    8,486.70x = 11,711.43 × 4,902.30
  4. Step 4: Simplify right side
    8,486.70x = 57,412,943.29
  5. Step 5: Solve for x
    x = 57,412,943.29/8,486.70
  6. Step 6: Final answer
    x = 6,765.05

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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.