Home / 21,558.90-29,750.81-11,998.37

Finding the Fourth Proportional to 21,558.90, 29,750.81 and 11,998.37

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Solution

The fourth proportional to 21,558.90, 29,750.81 and 11,998.37 is: 16,557.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,558.90 : 29,750.81 = 11,998.37 : x
  2. Step 2: Convert to fraction form
    21,558.90/29,750.81 = 11,998.37/x
  3. Step 3: Cross multiply
    21,558.90x = 29,750.81 × 11,998.37
  4. Step 4: Simplify right side
    21,558.90x = 356,961,226.18
  5. Step 5: Solve for x
    x = 356,961,226.18/21,558.90
  6. Step 6: Final answer
    x = 16,557.49

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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.