Home / 12,821.18-17,686.94-9,983.54

Finding the Fourth Proportional to 12,821.18, 17,686.94 and 9,983.54

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Solution

The fourth proportional to 12,821.18, 17,686.94 and 9,983.54 is: 13,772.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,821.18 : 17,686.94 = 9,983.54 : x
  2. Step 2: Convert to fraction form
    12,821.18/17,686.94 = 9,983.54/x
  3. Step 3: Cross multiply
    12,821.18x = 17,686.94 × 9,983.54
  4. Step 4: Simplify right side
    12,821.18x = 176,578,272.97
  5. Step 5: Solve for x
    x = 176,578,272.97/12,821.18
  6. Step 6: Final answer
    x = 13,772.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.