Home / 20,935.80-31,403.70-7,084.80

Finding the Fourth Proportional to 20,935.80, 31,403.70 and 7,084.80

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Solution

The fourth proportional to 20,935.80, 31,403.70 and 7,084.80 is: 10,627.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,935.80 : 31,403.70 = 7,084.80 : x
  2. Step 2: Convert to fraction form
    20,935.80/31,403.70 = 7,084.80/x
  3. Step 3: Cross multiply
    20,935.80x = 31,403.70 × 7,084.80
  4. Step 4: Simplify right side
    20,935.80x = 222,488,933.76
  5. Step 5: Solve for x
    x = 222,488,933.76/20,935.80
  6. Step 6: Final answer
    x = 10,627.20

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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.