Home / 20,720.36-28,593-11,767.64

Finding the Fourth Proportional to 20,720.36, 28,593 and 11,767.64

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Solution

The fourth proportional to 20,720.36, 28,593 and 11,767.64 is: 16,238.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.36 : 28,593 = 11,767.64 : x
  2. Step 2: Convert to fraction form
    20,720.36/28,593 = 11,767.64/x
  3. Step 3: Cross multiply
    20,720.36x = 28,593 × 11,767.64
  4. Step 4: Simplify right side
    20,720.36x = 336,472,130.52
  5. Step 5: Solve for x
    x = 336,472,130.52/20,720.36
  6. Step 6: Final answer
    x = 16,238.72

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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.