Home / 21,274.36-31,911.58-8,780.68

Finding the Fourth Proportional to 21,274.36, 31,911.58 and 8,780.68

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Solution

The fourth proportional to 21,274.36, 31,911.58 and 8,780.68 is: 13,171.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,274.36 : 31,911.58 = 8,780.68 : x
  2. Step 2: Convert to fraction form
    21,274.36/31,911.58 = 8,780.68/x
  3. Step 3: Cross multiply
    21,274.36x = 31,911.58 × 8,780.68
  4. Step 4: Simplify right side
    21,274.36x = 280,205,372.27
  5. Step 5: Solve for x
    x = 280,205,372.27/21,274.36
  6. Step 6: Final answer
    x = 13,171.04

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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.