Home / 21,539.34-29,724.12-11,978.91

Finding the Fourth Proportional to 21,539.34, 29,724.12 and 11,978.91

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Solution

The fourth proportional to 21,539.34, 29,724.12 and 11,978.91 is: 16,530.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,539.34 : 29,724.12 = 11,978.91 : x
  2. Step 2: Convert to fraction form
    21,539.34/29,724.12 = 11,978.91/x
  3. Step 3: Cross multiply
    21,539.34x = 29,724.12 × 11,978.91
  4. Step 4: Simplify right side
    21,539.34x = 356,062,558.31
  5. Step 5: Solve for x
    x = 356,062,558.31/21,539.34
  6. Step 6: Final answer
    x = 16,530.80

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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.