Home / 20,522.36-28,439.84-20,128.64

Finding the Fourth Proportional to 20,522.36, 28,439.84 and 20,128.64

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Solution

The fourth proportional to 20,522.36, 28,439.84 and 20,128.64 is: 27,894.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,522.36 : 28,439.84 = 20,128.64 : x
  2. Step 2: Convert to fraction form
    20,522.36/28,439.84 = 20,128.64/x
  3. Step 3: Cross multiply
    20,522.36x = 28,439.84 × 20,128.64
  4. Step 4: Simplify right side
    20,522.36x = 572,455,301.02
  5. Step 5: Solve for x
    x = 572,455,301.02/20,522.36
  6. Step 6: Final answer
    x = 27,894.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.