Home / 13,979.64-20,970.12-4,620.49

Finding the Fourth Proportional to 13,979.64, 20,970.12 and 4,620.49

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Solution

The fourth proportional to 13,979.64, 20,970.12 and 4,620.49 is: 6,930.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.64 : 20,970.12 = 4,620.49 : x
  2. Step 2: Convert to fraction form
    13,979.64/20,970.12 = 4,620.49/x
  3. Step 3: Cross multiply
    13,979.64x = 20,970.12 × 4,620.49
  4. Step 4: Simplify right side
    13,979.64x = 96,892,229.76
  5. Step 5: Solve for x
    x = 96,892,229.76/13,979.64
  6. Step 6: Final answer
    x = 6,930.95

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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.