Home / 20,772.39-28,666.53-11,821.18

Finding the Fourth Proportional to 20,772.39, 28,666.53 and 11,821.18

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Solution

The fourth proportional to 20,772.39, 28,666.53 and 11,821.18 is: 16,313.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.39 : 28,666.53 = 11,821.18 : x
  2. Step 2: Convert to fraction form
    20,772.39/28,666.53 = 11,821.18/x
  3. Step 3: Cross multiply
    20,772.39x = 28,666.53 × 11,821.18
  4. Step 4: Simplify right side
    20,772.39x = 338,872,246.94
  5. Step 5: Solve for x
    x = 338,872,246.94/20,772.39
  6. Step 6: Final answer
    x = 16,313.59

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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.