Home / 21,550.79-29,741.10-11,990.73

Finding the Fourth Proportional to 21,550.79, 29,741.10 and 11,990.73

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Solution

The fourth proportional to 21,550.79, 29,741.10 and 11,990.73 is: 16,547.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,550.79 : 29,741.10 = 11,990.73 : x
  2. Step 2: Convert to fraction form
    21,550.79/29,741.10 = 11,990.73/x
  3. Step 3: Cross multiply
    21,550.79x = 29,741.10 × 11,990.73
  4. Step 4: Simplify right side
    21,550.79x = 356,617,500.00
  5. Step 5: Solve for x
    x = 356,617,500.00/21,550.79
  6. Step 6: Final answer
    x = 16,547.77

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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.