Home / 20,966.39-28,926.73-11,890.72

Finding the Fourth Proportional to 20,966.39, 28,926.73 and 11,890.72

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Solution

The fourth proportional to 20,966.39, 28,926.73 and 11,890.72 is: 16,405.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,966.39 : 28,926.73 = 11,890.72 : x
  2. Step 2: Convert to fraction form
    20,966.39/28,926.73 = 11,890.72/x
  3. Step 3: Cross multiply
    20,966.39x = 28,926.73 × 11,890.72
  4. Step 4: Simplify right side
    20,966.39x = 343,959,587.49
  5. Step 5: Solve for x
    x = 343,959,587.49/20,966.39
  6. Step 6: Final answer
    x = 16,405.28

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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.