Home / 13,780.18-20,680.67-10,091.89

Finding the Fourth Proportional to 13,780.18, 20,680.67 and 10,091.89

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Solution

The fourth proportional to 13,780.18, 20,680.67 and 10,091.89 is: 15,145.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,780.18 : 20,680.67 = 10,091.89 : x
  2. Step 2: Convert to fraction form
    13,780.18/20,680.67 = 10,091.89/x
  3. Step 3: Cross multiply
    13,780.18x = 20,680.67 × 10,091.89
  4. Step 4: Simplify right side
    13,780.18x = 208,707,041.08
  5. Step 5: Solve for x
    x = 208,707,041.08/13,780.18
  6. Step 6: Final answer
    x = 15,145.46

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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.