Home / 13,729.20-20,587.80-6,331.20

Finding the Fourth Proportional to 13,729.20, 20,587.80 and 6,331.20

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Solution

The fourth proportional to 13,729.20, 20,587.80 and 6,331.20 is: 9,494.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,729.20 : 20,587.80 = 6,331.20 : x
  2. Step 2: Convert to fraction form
    13,729.20/20,587.80 = 6,331.20/x
  3. Step 3: Cross multiply
    13,729.20x = 20,587.80 × 6,331.20
  4. Step 4: Simplify right side
    13,729.20x = 130,345,479.36
  5. Step 5: Solve for x
    x = 130,345,479.36/13,729.20
  6. Step 6: Final answer
    x = 9,494.03

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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.