Home / 20,219.10-27,995.67-18,663.90

Finding the Fourth Proportional to 20,219.10, 27,995.67 and 18,663.90

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Solution

The fourth proportional to 20,219.10, 27,995.67 and 18,663.90 is: 25,842.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,219.10 : 27,995.67 = 18,663.90 : x
  2. Step 2: Convert to fraction form
    20,219.10/27,995.67 = 18,663.90/x
  3. Step 3: Cross multiply
    20,219.10x = 27,995.67 × 18,663.90
  4. Step 4: Simplify right side
    20,219.10x = 522,508,385.31
  5. Step 5: Solve for x
    x = 522,508,385.31/20,219.10
  6. Step 6: Final answer
    x = 25,842.32

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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.