Home / 21,470.90-29,631.56-11,911.73

Finding the Fourth Proportional to 21,470.90, 29,631.56 and 11,911.73

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Solution

The fourth proportional to 21,470.90, 29,631.56 and 11,911.73 is: 16,439.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,470.90 : 29,631.56 = 11,911.73 : x
  2. Step 2: Convert to fraction form
    21,470.90/29,631.56 = 11,911.73/x
  3. Step 3: Cross multiply
    21,470.90x = 29,631.56 × 11,911.73
  4. Step 4: Simplify right side
    21,470.90x = 352,962,934.48
  5. Step 5: Solve for x
    x = 352,962,934.48/21,470.90
  6. Step 6: Final answer
    x = 16,439.13

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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.