Home / 23,133.30-31,977.76-20,640.12

Finding the Fourth Proportional to 23,133.30, 31,977.76 and 20,640.12

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Solution

The fourth proportional to 23,133.30, 31,977.76 and 20,640.12 is: 28,531.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,133.30 : 31,977.76 = 20,640.12 : x
  2. Step 2: Convert to fraction form
    23,133.30/31,977.76 = 20,640.12/x
  3. Step 3: Cross multiply
    23,133.30x = 31,977.76 × 20,640.12
  4. Step 4: Simplify right side
    23,133.30x = 660,024,949.45
  5. Step 5: Solve for x
    x = 660,024,949.45/23,133.30
  6. Step 6: Final answer
    x = 28,531.37

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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.