Home / 20,716.83-28,612.98-13,674.69

Finding the Fourth Proportional to 20,716.83, 28,612.98 and 13,674.69

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Solution

The fourth proportional to 20,716.83, 28,612.98 and 13,674.69 is: 18,886.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,716.83 : 28,612.98 = 13,674.69 : x
  2. Step 2: Convert to fraction form
    20,716.83/28,612.98 = 13,674.69/x
  3. Step 3: Cross multiply
    20,716.83x = 28,612.98 × 13,674.69
  4. Step 4: Simplify right side
    20,716.83x = 391,273,631.48
  5. Step 5: Solve for x
    x = 391,273,631.48/20,716.83
  6. Step 6: Final answer
    x = 18,886.75

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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.