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Finding the Fourth Proportional to 20,488.48, 30,669.82 and 14,940.48

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Solution

The fourth proportional to 20,488.48, 30,669.82 and 14,940.48 is: 22,364.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,488.48 : 30,669.82 = 14,940.48 : x
  2. Step 2: Convert to fraction form
    20,488.48/30,669.82 = 14,940.48/x
  3. Step 3: Cross multiply
    20,488.48x = 30,669.82 × 14,940.48
  4. Step 4: Simplify right side
    20,488.48x = 458,221,832.31
  5. Step 5: Solve for x
    x = 458,221,832.31/20,488.48
  6. Step 6: Final answer
    x = 22,364.85

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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.