Home / 23,147.40-31,961.70-21,378.28

Finding the Fourth Proportional to 23,147.40, 31,961.70 and 21,378.28

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Solution

The fourth proportional to 23,147.40, 31,961.70 and 21,378.28 is: 29,518.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,147.40 : 31,961.70 = 21,378.28 : x
  2. Step 2: Convert to fraction form
    23,147.40/31,961.70 = 21,378.28/x
  3. Step 3: Cross multiply
    23,147.40x = 31,961.70 × 21,378.28
  4. Step 4: Simplify right side
    23,147.40x = 683,286,171.88
  5. Step 5: Solve for x
    x = 683,286,171.88/23,147.40
  6. Step 6: Final answer
    x = 29,518.92

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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.