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Finding the Fourth Proportional to 12,666.81, 18,998.51 and 3,307.49

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Solution

The fourth proportional to 12,666.81, 18,998.51 and 3,307.49 is: 4,960.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,666.81 : 18,998.51 = 3,307.49 : x
  2. Step 2: Convert to fraction form
    12,666.81/18,998.51 = 3,307.49/x
  3. Step 3: Cross multiply
    12,666.81x = 18,998.51 × 3,307.49
  4. Step 4: Simplify right side
    12,666.81x = 62,837,270.31
  5. Step 5: Solve for x
    x = 62,837,270.31/12,666.81
  6. Step 6: Final answer
    x = 4,960.78

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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.