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Finding the Fourth Proportional to 22,455.81, 30,991.11 and 12,897.03

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Solution

The fourth proportional to 22,455.81, 30,991.11 and 12,897.03 is: 17,799.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,455.81 : 30,991.11 = 12,897.03 : x
  2. Step 2: Convert to fraction form
    22,455.81/30,991.11 = 12,897.03/x
  3. Step 3: Cross multiply
    22,455.81x = 30,991.11 × 12,897.03
  4. Step 4: Simplify right side
    22,455.81x = 399,693,275.40
  5. Step 5: Solve for x
    x = 399,693,275.40/22,455.81
  6. Step 6: Final answer
    x = 17,799.10

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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.