Home / 20,786.16-28,708.68-15,146.20

Finding the Fourth Proportional to 20,786.16, 28,708.68 and 15,146.20

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Solution

The fourth proportional to 20,786.16, 28,708.68 and 15,146.20 is: 20,919.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.16 : 28,708.68 = 15,146.20 : x
  2. Step 2: Convert to fraction form
    20,786.16/28,708.68 = 15,146.20/x
  3. Step 3: Cross multiply
    20,786.16x = 28,708.68 × 15,146.20
  4. Step 4: Simplify right side
    20,786.16x = 434,827,409.02
  5. Step 5: Solve for x
    x = 434,827,409.02/20,786.16
  6. Step 6: Final answer
    x = 20,919.08

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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.