Home / 28,186.49-38,896.93-15,439.57

Finding the Fourth Proportional to 28,186.49, 38,896.93 and 15,439.57

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Solution

The fourth proportional to 28,186.49, 38,896.93 and 15,439.57 is: 21,306.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,186.49 : 38,896.93 = 15,439.57 : x
  2. Step 2: Convert to fraction form
    28,186.49/38,896.93 = 15,439.57/x
  3. Step 3: Cross multiply
    28,186.49x = 38,896.93 × 15,439.57
  4. Step 4: Simplify right side
    28,186.49x = 600,551,708.73
  5. Step 5: Solve for x
    x = 600,551,708.73/28,186.49
  6. Step 6: Final answer
    x = 21,306.37

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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.