Home / 21,280.12-31,908.84-8,124.94

Finding the Fourth Proportional to 21,280.12, 31,908.84 and 8,124.94

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Solution

The fourth proportional to 21,280.12, 31,908.84 and 8,124.94 is: 12,183.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,280.12 : 31,908.84 = 8,124.94 : x
  2. Step 2: Convert to fraction form
    21,280.12/31,908.84 = 8,124.94/x
  3. Step 3: Cross multiply
    21,280.12x = 31,908.84 × 8,124.94
  4. Step 4: Simplify right side
    21,280.12x = 259,257,410.47
  5. Step 5: Solve for x
    x = 259,257,410.47/21,280.12
  6. Step 6: Final answer
    x = 12,183.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.