Home / 12,201.51-16,821.80-9,691.93

Finding the Fourth Proportional to 12,201.51, 16,821.80 and 9,691.93

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Solution

The fourth proportional to 12,201.51, 16,821.80 and 9,691.93 is: 13,361.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,201.51 : 16,821.80 = 9,691.93 : x
  2. Step 2: Convert to fraction form
    12,201.51/16,821.80 = 9,691.93/x
  3. Step 3: Cross multiply
    12,201.51x = 16,821.80 × 9,691.93
  4. Step 4: Simplify right side
    12,201.51x = 163,035,708.07
  5. Step 5: Solve for x
    x = 163,035,708.07/12,201.51
  6. Step 6: Final answer
    x = 13,361.93

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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.