Home / 20,883.18-28,786.06-15,827.16

Finding the Fourth Proportional to 20,883.18, 28,786.06 and 15,827.16

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Solution

The fourth proportional to 20,883.18, 28,786.06 and 15,827.16 is: 21,816.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,883.18 : 28,786.06 = 15,827.16 : x
  2. Step 2: Convert to fraction form
    20,883.18/28,786.06 = 15,827.16/x
  3. Step 3: Cross multiply
    20,883.18x = 28,786.06 × 15,827.16
  4. Step 4: Simplify right side
    20,883.18x = 455,601,577.39
  5. Step 5: Solve for x
    x = 455,601,577.39/20,883.18
  6. Step 6: Final answer
    x = 21,816.68

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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.