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Finding the Fourth Proportional to 21,975.91, 30,327.62 and 12,417.91

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Solution

The fourth proportional to 21,975.91, 30,327.62 and 12,417.91 is: 17,137.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,975.91 : 30,327.62 = 12,417.91 : x
  2. Step 2: Convert to fraction form
    21,975.91/30,327.62 = 12,417.91/x
  3. Step 3: Cross multiply
    21,975.91x = 30,327.62 × 12,417.91
  4. Step 4: Simplify right side
    21,975.91x = 376,605,517.77
  5. Step 5: Solve for x
    x = 376,605,517.77/21,975.91
  6. Step 6: Final answer
    x = 17,137.20

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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.