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Finding the Fourth Proportional to 22,259.10, 30,720.49 and 12,696.79

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Solution

The fourth proportional to 22,259.10, 30,720.49 and 12,696.79 is: 17,523.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,259.10 : 30,720.49 = 12,696.79 : x
  2. Step 2: Convert to fraction form
    22,259.10/30,720.49 = 12,696.79/x
  3. Step 3: Cross multiply
    22,259.10x = 30,720.49 × 12,696.79
  4. Step 4: Simplify right side
    22,259.10x = 390,051,687.03
  5. Step 5: Solve for x
    x = 390,051,687.03/22,259.10
  6. Step 6: Final answer
    x = 17,523.25

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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.