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Finding the Fourth Proportional to 12,603.33, 18,869.43 and 6,666.78

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Solution

The fourth proportional to 12,603.33, 18,869.43 and 6,666.78 is: 9,981.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,603.33 : 18,869.43 = 6,666.78 : x
  2. Step 2: Convert to fraction form
    12,603.33/18,869.43 = 6,666.78/x
  3. Step 3: Cross multiply
    12,603.33x = 18,869.43 × 6,666.78
  4. Step 4: Simplify right side
    12,603.33x = 125,798,338.54
  5. Step 5: Solve for x
    x = 125,798,338.54/12,603.33
  6. Step 6: Final answer
    x = 9,981.36

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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.