Home / 20,909.91-28,866.87-16,119.39

Finding the Fourth Proportional to 20,909.91, 28,866.87 and 16,119.39

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Solution

The fourth proportional to 20,909.91, 28,866.87 and 16,119.39 is: 22,253.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.91 : 28,866.87 = 16,119.39 : x
  2. Step 2: Convert to fraction form
    20,909.91/28,866.87 = 16,119.39/x
  3. Step 3: Cross multiply
    20,909.91x = 28,866.87 × 16,119.39
  4. Step 4: Simplify right side
    20,909.91x = 465,316,335.61
  5. Step 5: Solve for x
    x = 465,316,335.61/20,909.91
  6. Step 6: Final answer
    x = 22,253.39

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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.