Home / 21,986.60-32,982.30-21,295.40

Finding the Fourth Proportional to 21,986.60, 32,982.30 and 21,295.40

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Solution

The fourth proportional to 21,986.60, 32,982.30 and 21,295.40 is: 31,945.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,986.60 : 32,982.30 = 21,295.40 : x
  2. Step 2: Convert to fraction form
    21,986.60/32,982.30 = 21,295.40/x
  3. Step 3: Cross multiply
    21,986.60x = 32,982.30 × 21,295.40
  4. Step 4: Simplify right side
    21,986.60x = 702,371,271.42
  5. Step 5: Solve for x
    x = 702,371,271.42/21,986.60
  6. Step 6: Final answer
    x = 31,945.42

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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.