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Finding the Fourth Proportional to 12,665.71, 18,986.94 and 4,868.65

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Solution

The fourth proportional to 12,665.71, 18,986.94 and 4,868.65 is: 7,298.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,665.71 : 18,986.94 = 4,868.65 : x
  2. Step 2: Convert to fraction form
    12,665.71/18,986.94 = 4,868.65/x
  3. Step 3: Cross multiply
    12,665.71x = 18,986.94 × 4,868.65
  4. Step 4: Simplify right side
    12,665.71x = 92,440,765.43
  5. Step 5: Solve for x
    x = 92,440,765.43/12,665.71
  6. Step 6: Final answer
    x = 7,298.51

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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.