Home / 22,120.96-30,528.48-12,689.68

Finding the Fourth Proportional to 22,120.96, 30,528.48 and 12,689.68

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Solution

The fourth proportional to 22,120.96, 30,528.48 and 12,689.68 is: 17,512.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,120.96 : 30,528.48 = 12,689.68 : x
  2. Step 2: Convert to fraction form
    22,120.96/30,528.48 = 12,689.68/x
  3. Step 3: Cross multiply
    22,120.96x = 30,528.48 × 12,689.68
  4. Step 4: Simplify right side
    22,120.96x = 387,396,642.09
  5. Step 5: Solve for x
    x = 387,396,642.09/22,120.96
  6. Step 6: Final answer
    x = 17,512.65

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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.