Home / 20,031.56-27,642.44-11,078.47

Finding the Fourth Proportional to 20,031.56, 27,642.44 and 11,078.47

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Solution

The fourth proportional to 20,031.56, 27,642.44 and 11,078.47 is: 15,287.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,031.56 : 27,642.44 = 11,078.47 : x
  2. Step 2: Convert to fraction form
    20,031.56/27,642.44 = 11,078.47/x
  3. Step 3: Cross multiply
    20,031.56x = 27,642.44 × 11,078.47
  4. Step 4: Simplify right side
    20,031.56x = 306,235,748.66
  5. Step 5: Solve for x
    x = 306,235,748.66/20,031.56
  6. Step 6: Final answer
    x = 15,287.67

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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.