Home / 28,186.34-38,897.09-15,439.78

Finding the Fourth Proportional to 28,186.34, 38,897.09 and 15,439.78

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Solution

The fourth proportional to 28,186.34, 38,897.09 and 15,439.78 is: 21,306.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,186.34 : 38,897.09 = 15,439.78 : x
  2. Step 2: Convert to fraction form
    28,186.34/38,897.09 = 15,439.78/x
  3. Step 3: Cross multiply
    28,186.34x = 38,897.09 × 15,439.78
  4. Step 4: Simplify right side
    28,186.34x = 600,562,317.75
  5. Step 5: Solve for x
    x = 600,562,317.75/28,186.34
  6. Step 6: Final answer
    x = 21,306.86

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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.