Home / 20,979.04-31,468.98-7,828.79

Finding the Fourth Proportional to 20,979.04, 31,468.98 and 7,828.79

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Solution

The fourth proportional to 20,979.04, 31,468.98 and 7,828.79 is: 11,743.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,979.04 : 31,468.98 = 7,828.79 : x
  2. Step 2: Convert to fraction form
    20,979.04/31,468.98 = 7,828.79/x
  3. Step 3: Cross multiply
    20,979.04x = 31,468.98 × 7,828.79
  4. Step 4: Simplify right side
    20,979.04x = 246,363,849.23
  5. Step 5: Solve for x
    x = 246,363,849.23/20,979.04
  6. Step 6: Final answer
    x = 11,743.33

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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.