Home / 21,299.60-31,938.30-7,961.63

Finding the Fourth Proportional to 21,299.60, 31,938.30 and 7,961.63

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Solution

The fourth proportional to 21,299.60, 31,938.30 and 7,961.63 is: 11,938.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,299.60 : 31,938.30 = 7,961.63 : x
  2. Step 2: Convert to fraction form
    21,299.60/31,938.30 = 7,961.63/x
  3. Step 3: Cross multiply
    21,299.60x = 31,938.30 × 7,961.63
  4. Step 4: Simplify right side
    21,299.60x = 254,280,927.43
  5. Step 5: Solve for x
    x = 254,280,927.43/21,299.60
  6. Step 6: Final answer
    x = 11,938.30

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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.