Home / 20,720.10-28,594.44-11,767.30

Finding the Fourth Proportional to 20,720.10, 28,594.44 and 11,767.30

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Solution

The fourth proportional to 20,720.10, 28,594.44 and 11,767.30 is: 16,239.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.10 : 28,594.44 = 11,767.30 : x
  2. Step 2: Convert to fraction form
    20,720.10/28,594.44 = 11,767.30/x
  3. Step 3: Cross multiply
    20,720.10x = 28,594.44 × 11,767.30
  4. Step 4: Simplify right side
    20,720.10x = 336,479,353.81
  5. Step 5: Solve for x
    x = 336,479,353.81/20,720.10
  6. Step 6: Final answer
    x = 16,239.27

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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.