Home / 13,429.09-20,116.21-6,387.80

Finding the Fourth Proportional to 13,429.09, 20,116.21 and 6,387.80

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Solution

The fourth proportional to 13,429.09, 20,116.21 and 6,387.80 is: 9,568.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,429.09 : 20,116.21 = 6,387.80 : x
  2. Step 2: Convert to fraction form
    13,429.09/20,116.21 = 6,387.80/x
  3. Step 3: Cross multiply
    13,429.09x = 20,116.21 × 6,387.80
  4. Step 4: Simplify right side
    13,429.09x = 128,498,294.30
  5. Step 5: Solve for x
    x = 128,498,294.30/13,429.09
  6. Step 6: Final answer
    x = 9,568.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.