Home / 20,429.88-28,195.84-12,470.40

Finding the Fourth Proportional to 20,429.88, 28,195.84 and 12,470.40

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Solution

The fourth proportional to 20,429.88, 28,195.84 and 12,470.40 is: 17,210.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,429.88 : 28,195.84 = 12,470.40 : x
  2. Step 2: Convert to fraction form
    20,429.88/28,195.84 = 12,470.40/x
  3. Step 3: Cross multiply
    20,429.88x = 28,195.84 × 12,470.40
  4. Step 4: Simplify right side
    20,429.88x = 351,613,403.14
  5. Step 5: Solve for x
    x = 351,613,403.14/20,429.88
  6. Step 6: Final answer
    x = 17,210.74

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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.