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Finding the Fourth Proportional to 21,894.95, 30,215.13 and 12,334.95

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Solution

The fourth proportional to 21,894.95, 30,215.13 and 12,334.95 is: 17,022.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,894.95 : 30,215.13 = 12,334.95 : x
  2. Step 2: Convert to fraction form
    21,894.95/30,215.13 = 12,334.95/x
  3. Step 3: Cross multiply
    21,894.95x = 30,215.13 × 12,334.95
  4. Step 4: Simplify right side
    21,894.95x = 372,702,156.52
  5. Step 5: Solve for x
    x = 372,702,156.52/21,894.95
  6. Step 6: Final answer
    x = 17,022.29

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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.