Home / 13,681.19-20,521.79-3,819.65

Finding the Fourth Proportional to 13,681.19, 20,521.79 and 3,819.65

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Solution

The fourth proportional to 13,681.19, 20,521.79 and 3,819.65 is: 5,729.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,681.19 : 20,521.79 = 3,819.65 : x
  2. Step 2: Convert to fraction form
    13,681.19/20,521.79 = 3,819.65/x
  3. Step 3: Cross multiply
    13,681.19x = 20,521.79 × 3,819.65
  4. Step 4: Simplify right side
    13,681.19x = 78,385,933.47
  5. Step 5: Solve for x
    x = 78,385,933.47/13,681.19
  6. Step 6: Final answer
    x = 5,729.47

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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.