Home / 21,972.31-30,321.65-11,900.52

Finding the Fourth Proportional to 21,972.31, 30,321.65 and 11,900.52

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Solution

The fourth proportional to 21,972.31, 30,321.65 and 11,900.52 is: 16,422.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,972.31 : 30,321.65 = 11,900.52 : x
  2. Step 2: Convert to fraction form
    21,972.31/30,321.65 = 11,900.52/x
  3. Step 3: Cross multiply
    21,972.31x = 30,321.65 × 11,900.52
  4. Step 4: Simplify right side
    21,972.31x = 360,843,432.01
  5. Step 5: Solve for x
    x = 360,843,432.01/21,972.31
  6. Step 6: Final answer
    x = 16,422.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.