Home / 31,490.20-43,442.43-21,277.94

Finding the Fourth Proportional to 31,490.20, 43,442.43 and 21,277.94

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Solution

The fourth proportional to 31,490.20, 43,442.43 and 21,277.94 is: 29,354.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,490.20 : 43,442.43 = 21,277.94 : x
  2. Step 2: Convert to fraction form
    31,490.20/43,442.43 = 21,277.94/x
  3. Step 3: Cross multiply
    31,490.20x = 43,442.43 × 21,277.94
  4. Step 4: Simplify right side
    31,490.20x = 924,365,121.99
  5. Step 5: Solve for x
    x = 924,365,121.99/31,490.20
  6. Step 6: Final answer
    x = 29,354.06

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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.