Home / 21,756.30-32,569.65-12,986.70

Finding the Fourth Proportional to 21,756.30, 32,569.65 and 12,986.70

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Solution

The fourth proportional to 21,756.30, 32,569.65 and 12,986.70 is: 19,441.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,756.30 : 32,569.65 = 12,986.70 : x
  2. Step 2: Convert to fraction form
    21,756.30/32,569.65 = 12,986.70/x
  3. Step 3: Cross multiply
    21,756.30x = 32,569.65 × 12,986.70
  4. Step 4: Simplify right side
    21,756.30x = 422,972,273.66
  5. Step 5: Solve for x
    x = 422,972,273.66/21,756.30
  6. Step 6: Final answer
    x = 19,441.37

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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.