Home / 20,142.51-27,798.29-11,191.60

Finding the Fourth Proportional to 20,142.51, 27,798.29 and 11,191.60

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Solution

The fourth proportional to 20,142.51, 27,798.29 and 11,191.60 is: 15,445.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.51 : 27,798.29 = 11,191.60 : x
  2. Step 2: Convert to fraction form
    20,142.51/27,798.29 = 11,191.60/x
  3. Step 3: Cross multiply
    20,142.51x = 27,798.29 × 11,191.60
  4. Step 4: Simplify right side
    20,142.51x = 311,107,363.12
  5. Step 5: Solve for x
    x = 311,107,363.12/20,142.51
  6. Step 6: Final answer
    x = 15,445.32

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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.