Home / 13,979.34-20,969.28-5,212.44

Finding the Fourth Proportional to 13,979.34, 20,969.28 and 5,212.44

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Solution

The fourth proportional to 13,979.34, 20,969.28 and 5,212.44 is: 7,818.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.34 : 20,969.28 = 5,212.44 : x
  2. Step 2: Convert to fraction form
    13,979.34/20,969.28 = 5,212.44/x
  3. Step 3: Cross multiply
    13,979.34x = 20,969.28 × 5,212.44
  4. Step 4: Simplify right side
    13,979.34x = 109,301,113.84
  5. Step 5: Solve for x
    x = 109,301,113.84/13,979.34
  6. Step 6: Final answer
    x = 7,818.76

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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.