Home / 13,990.32-20,979.20-4,126.14

Finding the Fourth Proportional to 13,990.32, 20,979.20 and 4,126.14

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Solution

The fourth proportional to 13,990.32, 20,979.20 and 4,126.14 is: 6,187.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,990.32 : 20,979.20 = 4,126.14 : x
  2. Step 2: Convert to fraction form
    13,990.32/20,979.20 = 4,126.14/x
  3. Step 3: Cross multiply
    13,990.32x = 20,979.20 × 4,126.14
  4. Step 4: Simplify right side
    13,990.32x = 86,563,116.29
  5. Step 5: Solve for x
    x = 86,563,116.29/13,990.32
  6. Step 6: Final answer
    x = 6,187.36

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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.