Home / 13,979.91-20,970.57-4,620.77

Finding the Fourth Proportional to 13,979.91, 20,970.57 and 4,620.77

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Solution

The fourth proportional to 13,979.91, 20,970.57 and 4,620.77 is: 6,931.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.91 : 20,970.57 = 4,620.77 : x
  2. Step 2: Convert to fraction form
    13,979.91/20,970.57 = 4,620.77/x
  3. Step 3: Cross multiply
    13,979.91x = 20,970.57 × 4,620.77
  4. Step 4: Simplify right side
    13,979.91x = 96,900,180.74
  5. Step 5: Solve for x
    x = 96,900,180.74/13,979.91
  6. Step 6: Final answer
    x = 6,931.39

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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.