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Finding the Fourth Proportional to 8,795.70, 12,123.81 and 6,878.16

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Solution

The fourth proportional to 8,795.70, 12,123.81 and 6,878.16 is: 9,480.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,795.70 : 12,123.81 = 6,878.16 : x
  2. Step 2: Convert to fraction form
    8,795.70/12,123.81 = 6,878.16/x
  3. Step 3: Cross multiply
    8,795.70x = 12,123.81 × 6,878.16
  4. Step 4: Simplify right side
    8,795.70x = 83,389,504.99
  5. Step 5: Solve for x
    x = 83,389,504.99/8,795.70
  6. Step 6: Final answer
    x = 9,480.71

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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.