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Finding the Fourth Proportional to 8,758.78, 12,087.28 and 4,780.06

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Solution

The fourth proportional to 8,758.78, 12,087.28 and 4,780.06 is: 6,596.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,758.78 : 12,087.28 = 4,780.06 : x
  2. Step 2: Convert to fraction form
    8,758.78/12,087.28 = 4,780.06/x
  3. Step 3: Cross multiply
    8,758.78x = 12,087.28 × 4,780.06
  4. Step 4: Simplify right side
    8,758.78x = 57,777,923.64
  5. Step 5: Solve for x
    x = 57,777,923.64/8,758.78
  6. Step 6: Final answer
    x = 6,596.57

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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.