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Finding the Fourth Proportional to 8,785.75, 12,123.74 and 5,009.53

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Solution

The fourth proportional to 8,785.75, 12,123.74 and 5,009.53 is: 6,912.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,785.75 : 12,123.74 = 5,009.53 : x
  2. Step 2: Convert to fraction form
    8,785.75/12,123.74 = 5,009.53/x
  3. Step 3: Cross multiply
    8,785.75x = 12,123.74 × 5,009.53
  4. Step 4: Simplify right side
    8,785.75x = 60,734,239.24
  5. Step 5: Solve for x
    x = 60,734,239.24/8,785.75
  6. Step 6: Final answer
    x = 6,912.81

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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.