Home / 20,631.69-28,472.22-12,669.39

Finding the Fourth Proportional to 20,631.69, 28,472.22 and 12,669.39

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Solution

The fourth proportional to 20,631.69, 28,472.22 and 12,669.39 is: 17,484.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631.69 : 28,472.22 = 12,669.39 : x
  2. Step 2: Convert to fraction form
    20,631.69/28,472.22 = 12,669.39/x
  3. Step 3: Cross multiply
    20,631.69x = 28,472.22 × 12,669.39
  4. Step 4: Simplify right side
    20,631.69x = 360,725,659.35
  5. Step 5: Solve for x
    x = 360,725,659.35/20,631.69
  6. Step 6: Final answer
    x = 17,484.06

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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.