Home / 21,990.96-30,345.84-13,037.76

Finding the Fourth Proportional to 21,990.96, 30,345.84 and 13,037.76

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Solution

The fourth proportional to 21,990.96, 30,345.84 and 13,037.76 is: 17,991.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,990.96 : 30,345.84 = 13,037.76 : x
  2. Step 2: Convert to fraction form
    21,990.96/30,345.84 = 13,037.76/x
  3. Step 3: Cross multiply
    21,990.96x = 30,345.84 × 13,037.76
  4. Step 4: Simplify right side
    21,990.96x = 395,641,778.92
  5. Step 5: Solve for x
    x = 395,641,778.92/21,990.96
  6. Step 6: Final answer
    x = 17,991.11

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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.