Home / 20,662.91-28,528.54-15,874.32

Finding the Fourth Proportional to 20,662.91, 28,528.54 and 15,874.32

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Solution

The fourth proportional to 20,662.91, 28,528.54 and 15,874.32 is: 21,917.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,662.91 : 28,528.54 = 15,874.32 : x
  2. Step 2: Convert to fraction form
    20,662.91/28,528.54 = 15,874.32/x
  3. Step 3: Cross multiply
    20,662.91x = 28,528.54 × 15,874.32
  4. Step 4: Simplify right side
    20,662.91x = 452,871,173.09
  5. Step 5: Solve for x
    x = 452,871,173.09/20,662.91
  6. Step 6: Final answer
    x = 21,917.11

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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.