Home / 20,691.84-28,545.94-12,308.34

Finding the Fourth Proportional to 20,691.84, 28,545.94 and 12,308.34

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Solution

The fourth proportional to 20,691.84, 28,545.94 and 12,308.34 is: 16,980.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.84 : 28,545.94 = 12,308.34 : x
  2. Step 2: Convert to fraction form
    20,691.84/28,545.94 = 12,308.34/x
  3. Step 3: Cross multiply
    20,691.84x = 28,545.94 × 12,308.34
  4. Step 4: Simplify right side
    20,691.84x = 351,353,135.14
  5. Step 5: Solve for x
    x = 351,353,135.14/20,691.84
  6. Step 6: Final answer
    x = 16,980.28

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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.