Home / 20,155.02-27,811.40-11,201.90

Finding the Fourth Proportional to 20,155.02, 27,811.40 and 11,201.90

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Solution

The fourth proportional to 20,155.02, 27,811.40 and 11,201.90 is: 15,457.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,155.02 : 27,811.40 = 11,201.90 : x
  2. Step 2: Convert to fraction form
    20,155.02/27,811.40 = 11,201.90/x
  3. Step 3: Cross multiply
    20,155.02x = 27,811.40 × 11,201.90
  4. Step 4: Simplify right side
    20,155.02x = 311,540,521.66
  5. Step 5: Solve for x
    x = 311,540,521.66/20,155.02
  6. Step 6: Final answer
    x = 15,457.22

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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.