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Finding the Fourth Proportional to 21,356.70, 29,470.22 and 12,404.02

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Solution

The fourth proportional to 21,356.70, 29,470.22 and 12,404.02 is: 17,116.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,356.70 : 29,470.22 = 12,404.02 : x
  2. Step 2: Convert to fraction form
    21,356.70/29,470.22 = 12,404.02/x
  3. Step 3: Cross multiply
    21,356.70x = 29,470.22 × 12,404.02
  4. Step 4: Simplify right side
    21,356.70x = 365,549,198.28
  5. Step 5: Solve for x
    x = 365,549,198.28/21,356.70
  6. Step 6: Final answer
    x = 17,116.37

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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.