Home / 12,607.79-18,907.18-4,172.75

Finding the Fourth Proportional to 12,607.79, 18,907.18 and 4,172.75

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Solution

The fourth proportional to 12,607.79, 18,907.18 and 4,172.75 is: 6,257.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,607.79 : 18,907.18 = 4,172.75 : x
  2. Step 2: Convert to fraction form
    12,607.79/18,907.18 = 4,172.75/x
  3. Step 3: Cross multiply
    12,607.79x = 18,907.18 × 4,172.75
  4. Step 4: Simplify right side
    12,607.79x = 78,894,935.35
  5. Step 5: Solve for x
    x = 78,894,935.35/12,607.79
  6. Step 6: Final answer
    x = 6,257.63

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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.