Home / 20,107.10-27,781.18-15,890.50

Finding the Fourth Proportional to 20,107.10, 27,781.18 and 15,890.50

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Solution

The fourth proportional to 20,107.10, 27,781.18 and 15,890.50 is: 21,955.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,107.10 : 27,781.18 = 15,890.50 : x
  2. Step 2: Convert to fraction form
    20,107.10/27,781.18 = 15,890.50/x
  3. Step 3: Cross multiply
    20,107.10x = 27,781.18 × 15,890.50
  4. Step 4: Simplify right side
    20,107.10x = 441,456,840.79
  5. Step 5: Solve for x
    x = 441,456,840.79/20,107.10
  6. Step 6: Final answer
    x = 21,955.27

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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.