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Finding the Fourth Proportional to 21,894.08, 30,206.24 and 12,460.24

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Solution

The fourth proportional to 21,894.08, 30,206.24 and 12,460.24 is: 17,190.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,894.08 : 30,206.24 = 12,460.24 : x
  2. Step 2: Convert to fraction form
    21,894.08/30,206.24 = 12,460.24/x
  3. Step 3: Cross multiply
    21,894.08x = 30,206.24 × 12,460.24
  4. Step 4: Simplify right side
    21,894.08x = 376,376,999.90
  5. Step 5: Solve for x
    x = 376,376,999.90/21,894.08
  6. Step 6: Final answer
    x = 17,190.81

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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.