Home / 20,948.48-31,422.72-9,258.56

Finding the Fourth Proportional to 20,948.48, 31,422.72 and 9,258.56

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Solution

The fourth proportional to 20,948.48, 31,422.72 and 9,258.56 is: 13,887.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,948.48 : 31,422.72 = 9,258.56 : x
  2. Step 2: Convert to fraction form
    20,948.48/31,422.72 = 9,258.56/x
  3. Step 3: Cross multiply
    20,948.48x = 31,422.72 × 9,258.56
  4. Step 4: Simplify right side
    20,948.48x = 290,929,138.48
  5. Step 5: Solve for x
    x = 290,929,138.48/20,948.48
  6. Step 6: Final answer
    x = 13,887.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.