Home / 21,299.86-31,907.88-20,086.12

Finding the Fourth Proportional to 21,299.86, 31,907.88 and 20,086.12

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Solution

The fourth proportional to 21,299.86, 31,907.88 and 20,086.12 is: 30,089.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,299.86 : 31,907.88 = 20,086.12 : x
  2. Step 2: Convert to fraction form
    21,299.86/31,907.88 = 20,086.12/x
  3. Step 3: Cross multiply
    21,299.86x = 31,907.88 × 20,086.12
  4. Step 4: Simplify right side
    21,299.86x = 640,905,506.63
  5. Step 5: Solve for x
    x = 640,905,506.63/21,299.86
  6. Step 6: Final answer
    x = 30,089.66

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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.