Home / 20,909.22-28,853.85-11,477.98

Finding the Fourth Proportional to 20,909.22, 28,853.85 and 11,477.98

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Solution

The fourth proportional to 20,909.22, 28,853.85 and 11,477.98 is: 15,839.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.22 : 28,853.85 = 11,477.98 : x
  2. Step 2: Convert to fraction form
    20,909.22/28,853.85 = 11,477.98/x
  3. Step 3: Cross multiply
    20,909.22x = 28,853.85 × 11,477.98
  4. Step 4: Simplify right side
    20,909.22x = 331,183,913.22
  5. Step 5: Solve for x
    x = 331,183,913.22/20,909.22
  6. Step 6: Final answer
    x = 15,839.13

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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.