Home / 13,748.92-20,620.79-3,888.12

Finding the Fourth Proportional to 13,748.92, 20,620.79 and 3,888.12

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Solution

The fourth proportional to 13,748.92, 20,620.79 and 3,888.12 is: 5,831.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,748.92 : 20,620.79 = 3,888.12 : x
  2. Step 2: Convert to fraction form
    13,748.92/20,620.79 = 3,888.12/x
  3. Step 3: Cross multiply
    13,748.92x = 20,620.79 × 3,888.12
  4. Step 4: Simplify right side
    13,748.92x = 80,176,106.01
  5. Step 5: Solve for x
    x = 80,176,106.01/13,748.92
  6. Step 6: Final answer
    x = 5,831.45

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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.