Home / 20,215.78-30,328.28-6,177.80

Finding the Fourth Proportional to 20,215.78, 30,328.28 and 6,177.80

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Solution

The fourth proportional to 20,215.78, 30,328.28 and 6,177.80 is: 9,268.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,215.78 : 30,328.28 = 6,177.80 : x
  2. Step 2: Convert to fraction form
    20,215.78/30,328.28 = 6,177.80/x
  3. Step 3: Cross multiply
    20,215.78x = 30,328.28 × 6,177.80
  4. Step 4: Simplify right side
    20,215.78x = 187,362,056.65
  5. Step 5: Solve for x
    x = 187,362,056.65/20,215.78
  6. Step 6: Final answer
    x = 9,268.11

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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.