Home / 20,702.94-28,589.02-13,151.70

Finding the Fourth Proportional to 20,702.94, 28,589.02 and 13,151.70

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Solution

The fourth proportional to 20,702.94, 28,589.02 and 13,151.70 is: 18,161.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,702.94 : 28,589.02 = 13,151.70 : x
  2. Step 2: Convert to fraction form
    20,702.94/28,589.02 = 13,151.70/x
  3. Step 3: Cross multiply
    20,702.94x = 28,589.02 × 13,151.70
  4. Step 4: Simplify right side
    20,702.94x = 375,994,214.33
  5. Step 5: Solve for x
    x = 375,994,214.33/20,702.94
  6. Step 6: Final answer
    x = 18,161.39

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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.