Home / 20,568.87-28,385.58-12,615.48

Finding the Fourth Proportional to 20,568.87, 28,385.58 and 12,615.48

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Solution

The fourth proportional to 20,568.87, 28,385.58 and 12,615.48 is: 17,409.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,568.87 : 28,385.58 = 12,615.48 : x
  2. Step 2: Convert to fraction form
    20,568.87/28,385.58 = 12,615.48/x
  3. Step 3: Cross multiply
    20,568.87x = 28,385.58 × 12,615.48
  4. Step 4: Simplify right side
    20,568.87x = 358,097,716.78
  5. Step 5: Solve for x
    x = 358,097,716.78/20,568.87
  6. Step 6: Final answer
    x = 17,409.69

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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.