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Finding the Fourth Proportional to 12,261.80, 16,920.11 and 6,883.00

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Solution

The fourth proportional to 12,261.80, 16,920.11 and 6,883.00 is: 9,497.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,261.80 : 16,920.11 = 6,883.00 : x
  2. Step 2: Convert to fraction form
    12,261.80/16,920.11 = 6,883.00/x
  3. Step 3: Cross multiply
    12,261.80x = 16,920.11 × 6,883.00
  4. Step 4: Simplify right side
    12,261.80x = 116,461,159.43
  5. Step 5: Solve for x
    x = 116,461,159.43/12,261.80
  6. Step 6: Final answer
    x = 9,497.89

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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.