Home / 39,921.85-55,103.66-27,988.12

Finding the Fourth Proportional to 39,921.85, 55,103.66 and 27,988.12

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Solution

The fourth proportional to 39,921.85, 55,103.66 and 27,988.12 is: 38,631.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,921.85 : 55,103.66 = 27,988.12 : x
  2. Step 2: Convert to fraction form
    39,921.85/55,103.66 = 27,988.12/x
  3. Step 3: Cross multiply
    39,921.85x = 55,103.66 × 27,988.12
  4. Step 4: Simplify right side
    39,921.85x = 1,542,247,848.52
  5. Step 5: Solve for x
    x = 1,542,247,848.52/39,921.85
  6. Step 6: Final answer
    x = 38,631.67

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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.