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Finding the Fourth Proportional to 12,579.84, 18,870.84 and 4,262.22

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Solution

The fourth proportional to 12,579.84, 18,870.84 and 4,262.22 is: 6,393.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,579.84 : 18,870.84 = 4,262.22 : x
  2. Step 2: Convert to fraction form
    12,579.84/18,870.84 = 4,262.22/x
  3. Step 3: Cross multiply
    12,579.84x = 18,870.84 × 4,262.22
  4. Step 4: Simplify right side
    12,579.84x = 80,431,671.66
  5. Step 5: Solve for x
    x = 80,431,671.66/12,579.84
  6. Step 6: Final answer
    x = 6,393.70

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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.