Home / 20,909.45-28,853.74-11,477.95

Finding the Fourth Proportional to 20,909.45, 28,853.74 and 11,477.95

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Solution

The fourth proportional to 20,909.45, 28,853.74 and 11,477.95 is: 15,838.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.45 : 28,853.74 = 11,477.95 : x
  2. Step 2: Convert to fraction form
    20,909.45/28,853.74 = 11,477.95/x
  3. Step 3: Cross multiply
    20,909.45x = 28,853.74 × 11,477.95
  4. Step 4: Simplify right side
    20,909.45x = 331,181,785.03
  5. Step 5: Solve for x
    x = 331,181,785.03/20,909.45
  6. Step 6: Final answer
    x = 15,838.86

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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.