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Finding the Fourth Proportional to 22,791.03, 31,447.60 and 12,718.68

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Solution

The fourth proportional to 22,791.03, 31,447.60 and 12,718.68 is: 17,549.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,791.03 : 31,447.60 = 12,718.68 : x
  2. Step 2: Convert to fraction form
    22,791.03/31,447.60 = 12,718.68/x
  3. Step 3: Cross multiply
    22,791.03x = 31,447.60 × 12,718.68
  4. Step 4: Simplify right side
    22,791.03x = 399,971,961.17
  5. Step 5: Solve for x
    x = 399,971,961.17/22,791.03
  6. Step 6: Final answer
    x = 17,549.53

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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.