Home / 13,979.18-20,971.11-6,959.57

Finding the Fourth Proportional to 13,979.18, 20,971.11 and 6,959.57

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Solution

The fourth proportional to 13,979.18, 20,971.11 and 6,959.57 is: 10,440.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.18 : 20,971.11 = 6,959.57 : x
  2. Step 2: Convert to fraction form
    13,979.18/20,971.11 = 6,959.57/x
  3. Step 3: Cross multiply
    13,979.18x = 20,971.11 × 6,959.57
  4. Step 4: Simplify right side
    13,979.18x = 145,949,908.02
  5. Step 5: Solve for x
    x = 145,949,908.02/13,979.18
  6. Step 6: Final answer
    x = 10,440.52

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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.