Home / 20,345.26-28,076.07-13,258.30

Finding the Fourth Proportional to 20,345.26, 28,076.07 and 13,258.30

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Solution

The fourth proportional to 20,345.26, 28,076.07 and 13,258.30 is: 18,296.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,345.26 : 28,076.07 = 13,258.30 : x
  2. Step 2: Convert to fraction form
    20,345.26/28,076.07 = 13,258.30/x
  3. Step 3: Cross multiply
    20,345.26x = 28,076.07 × 13,258.30
  4. Step 4: Simplify right side
    20,345.26x = 372,240,958.88
  5. Step 5: Solve for x
    x = 372,240,958.88/20,345.26
  6. Step 6: Final answer
    x = 18,296.20

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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.