Home / 20,770.90-28,663.64-12,809.94

Finding the Fourth Proportional to 20,770.90, 28,663.64 and 12,809.94

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Solution

The fourth proportional to 20,770.90, 28,663.64 and 12,809.94 is: 17,677.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,770.90 : 28,663.64 = 12,809.94 : x
  2. Step 2: Convert to fraction form
    20,770.90/28,663.64 = 12,809.94/x
  3. Step 3: Cross multiply
    20,770.90x = 28,663.64 × 12,809.94
  4. Step 4: Simplify right side
    20,770.90x = 367,179,508.58
  5. Step 5: Solve for x
    x = 367,179,508.58/20,770.90
  6. Step 6: Final answer
    x = 17,677.59

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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.