Home / 20,280.36-27,986.85-11,327.88

Finding the Fourth Proportional to 20,280.36, 27,986.85 and 11,327.88

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Solution

The fourth proportional to 20,280.36, 27,986.85 and 11,327.88 is: 15,632.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.36 : 27,986.85 = 11,327.88 : x
  2. Step 2: Convert to fraction form
    20,280.36/27,986.85 = 11,327.88/x
  3. Step 3: Cross multiply
    20,280.36x = 27,986.85 × 11,327.88
  4. Step 4: Simplify right side
    20,280.36x = 317,031,678.38
  5. Step 5: Solve for x
    x = 317,031,678.38/20,280.36
  6. Step 6: Final answer
    x = 15,632.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.