Home / 21,998.77-30,355.40-12,439.96

Finding the Fourth Proportional to 21,998.77, 30,355.40 and 12,439.96

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Solution

The fourth proportional to 21,998.77, 30,355.40 and 12,439.96 is: 17,165.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,998.77 : 30,355.40 = 12,439.96 : x
  2. Step 2: Convert to fraction form
    21,998.77/30,355.40 = 12,439.96/x
  3. Step 3: Cross multiply
    21,998.77x = 30,355.40 × 12,439.96
  4. Step 4: Simplify right side
    21,998.77x = 377,619,961.78
  5. Step 5: Solve for x
    x = 377,619,961.78/21,998.77
  6. Step 6: Final answer
    x = 17,165.50

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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.