Home / 20,031.50-27,642.98-11,078.81

Finding the Fourth Proportional to 20,031.50, 27,642.98 and 11,078.81

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Solution

The fourth proportional to 20,031.50, 27,642.98 and 11,078.81 is: 15,288.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,031.50 : 27,642.98 = 11,078.81 : x
  2. Step 2: Convert to fraction form
    20,031.50/27,642.98 = 11,078.81/x
  3. Step 3: Cross multiply
    20,031.50x = 27,642.98 × 11,078.81
  4. Step 4: Simplify right side
    20,031.50x = 306,251,316.40
  5. Step 5: Solve for x
    x = 306,251,316.40/20,031.50
  6. Step 6: Final answer
    x = 15,288.48

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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.