Home / 12,816.12-17,686.86-7,227

Finding the Fourth Proportional to 12,816.12, 17,686.86 and 7,227

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Solution

The fourth proportional to 12,816.12, 17,686.86 and 7,227 is: 9,973.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,816.12 : 17,686.86 = 7,227 : x
  2. Step 2: Convert to fraction form
    12,816.12/17,686.86 = 7,227/x
  3. Step 3: Cross multiply
    12,816.12x = 17,686.86 × 7,227
  4. Step 4: Simplify right side
    12,816.12x = 127,822,937.22
  5. Step 5: Solve for x
    x = 127,822,937.22/12,816.12
  6. Step 6: Final answer
    x = 9,973.61

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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.