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Finding the Fourth Proportional to 21,999.57, 30,359.70 and 12,568.14

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Solution

The fourth proportional to 21,999.57, 30,359.70 and 12,568.14 is: 17,344.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,999.57 : 30,359.70 = 12,568.14 : x
  2. Step 2: Convert to fraction form
    21,999.57/30,359.70 = 12,568.14/x
  3. Step 3: Cross multiply
    21,999.57x = 30,359.70 × 12,568.14
  4. Step 4: Simplify right side
    21,999.57x = 381,564,959.96
  5. Step 5: Solve for x
    x = 381,564,959.96/21,999.57
  6. Step 6: Final answer
    x = 17,344.20

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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.