Home / 20,923.75-31,387.69-6,878.08

Finding the Fourth Proportional to 20,923.75, 31,387.69 and 6,878.08

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Solution

The fourth proportional to 20,923.75, 31,387.69 and 6,878.08 is: 10,317.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,923.75 : 31,387.69 = 6,878.08 : x
  2. Step 2: Convert to fraction form
    20,923.75/31,387.69 = 6,878.08/x
  3. Step 3: Cross multiply
    20,923.75x = 31,387.69 × 6,878.08
  4. Step 4: Simplify right side
    20,923.75x = 215,886,875.42
  5. Step 5: Solve for x
    x = 215,886,875.42/20,923.75
  6. Step 6: Final answer
    x = 10,317.79

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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.