Home / 20,825.16-31,237.80-7,671.84

Finding the Fourth Proportional to 20,825.16, 31,237.80 and 7,671.84

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Solution

The fourth proportional to 20,825.16, 31,237.80 and 7,671.84 is: 11,507.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,825.16 : 31,237.80 = 7,671.84 : x
  2. Step 2: Convert to fraction form
    20,825.16/31,237.80 = 7,671.84/x
  3. Step 3: Cross multiply
    20,825.16x = 31,237.80 × 7,671.84
  4. Step 4: Simplify right side
    20,825.16x = 239,651,403.55
  5. Step 5: Solve for x
    x = 239,651,403.55/20,825.16
  6. Step 6: Final answer
    x = 11,507.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.