Home / 20,689.23-31,029.25-8,205.92

Finding the Fourth Proportional to 20,689.23, 31,029.25 and 8,205.92

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Solution

The fourth proportional to 20,689.23, 31,029.25 and 8,205.92 is: 12,307.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.23 : 31,029.25 = 8,205.92 : x
  2. Step 2: Convert to fraction form
    20,689.23/31,029.25 = 8,205.92/x
  3. Step 3: Cross multiply
    20,689.23x = 31,029.25 × 8,205.92
  4. Step 4: Simplify right side
    20,689.23x = 254,623,543.16
  5. Step 5: Solve for x
    x = 254,623,543.16/20,689.23
  6. Step 6: Final answer
    x = 12,307.06

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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.