Home / 20,909.02-28,853.67-11,348.70

Finding the Fourth Proportional to 20,909.02, 28,853.67 and 11,348.70

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Solution

The fourth proportional to 20,909.02, 28,853.67 and 11,348.70 is: 15,660.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.02 : 28,853.67 = 11,348.70 : x
  2. Step 2: Convert to fraction form
    20,909.02/28,853.67 = 11,348.70/x
  3. Step 3: Cross multiply
    20,909.02x = 28,853.67 × 11,348.70
  4. Step 4: Simplify right side
    20,909.02x = 327,451,596.40
  5. Step 5: Solve for x
    x = 327,451,596.40/20,909.02
  6. Step 6: Final answer
    x = 15,660.78

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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.