Home / 21,986.76-32,885.89-20,391.34

Finding the Fourth Proportional to 21,986.76, 32,885.89 and 20,391.34

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Solution

The fourth proportional to 21,986.76, 32,885.89 and 20,391.34 is: 30,499.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,986.76 : 32,885.89 = 20,391.34 : x
  2. Step 2: Convert to fraction form
    21,986.76/32,885.89 = 20,391.34/x
  3. Step 3: Cross multiply
    21,986.76x = 32,885.89 × 20,391.34
  4. Step 4: Simplify right side
    21,986.76x = 670,587,364.19
  5. Step 5: Solve for x
    x = 670,587,364.19/21,986.76
  6. Step 6: Final answer
    x = 30,499.60

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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.