Home / 18,220.45-27,318.98-7,687.59

Finding the Fourth Proportional to 18,220.45, 27,318.98 and 7,687.59

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Solution

The fourth proportional to 18,220.45, 27,318.98 and 7,687.59 is: 11,526.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,220.45 : 27,318.98 = 7,687.59 : x
  2. Step 2: Convert to fraction form
    18,220.45/27,318.98 = 7,687.59/x
  3. Step 3: Cross multiply
    18,220.45x = 27,318.98 × 7,687.59
  4. Step 4: Simplify right side
    18,220.45x = 210,017,079.02
  5. Step 5: Solve for x
    x = 210,017,079.02/18,220.45
  6. Step 6: Final answer
    x = 11,526.45

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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.