Home / 20,801.85-31,185.22-9,702.69

Finding the Fourth Proportional to 20,801.85, 31,185.22 and 9,702.69

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Solution

The fourth proportional to 20,801.85, 31,185.22 and 9,702.69 is: 14,545.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,801.85 : 31,185.22 = 9,702.69 : x
  2. Step 2: Convert to fraction form
    20,801.85/31,185.22 = 9,702.69/x
  3. Step 3: Cross multiply
    20,801.85x = 31,185.22 × 9,702.69
  4. Step 4: Simplify right side
    20,801.85x = 302,580,522.24
  5. Step 5: Solve for x
    x = 302,580,522.24/20,801.85
  6. Step 6: Final answer
    x = 14,545.85

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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.