Home / 21,005.08-31,520.79-8,525.16

Finding the Fourth Proportional to 21,005.08, 31,520.79 and 8,525.16

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Solution

The fourth proportional to 21,005.08, 31,520.79 and 8,525.16 is: 12,793.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.08 : 31,520.79 = 8,525.16 : x
  2. Step 2: Convert to fraction form
    21,005.08/31,520.79 = 8,525.16/x
  3. Step 3: Cross multiply
    21,005.08x = 31,520.79 × 8,525.16
  4. Step 4: Simplify right side
    21,005.08x = 268,719,778.08
  5. Step 5: Solve for x
    x = 268,719,778.08/21,005.08
  6. Step 6: Final answer
    x = 12,793.09

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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.