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Finding the Fourth Proportional to 8,578.51, 12,858.95 and 4,872.83

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Solution

The fourth proportional to 8,578.51, 12,858.95 and 4,872.83 is: 7,304.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,578.51 : 12,858.95 = 4,872.83 : x
  2. Step 2: Convert to fraction form
    8,578.51/12,858.95 = 4,872.83/x
  3. Step 3: Cross multiply
    8,578.51x = 12,858.95 × 4,872.83
  4. Step 4: Simplify right side
    8,578.51x = 62,659,457.36
  5. Step 5: Solve for x
    x = 62,659,457.36/8,578.51
  6. Step 6: Final answer
    x = 7,304.24

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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.