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Finding the Fourth Proportional to 28,617.66, 42,918.66 and 11,974.14

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Solution

The fourth proportional to 28,617.66, 42,918.66 and 11,974.14 is: 17,957.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,617.66 : 42,918.66 = 11,974.14 : x
  2. Step 2: Convert to fraction form
    28,617.66/42,918.66 = 11,974.14/x
  3. Step 3: Cross multiply
    28,617.66x = 42,918.66 × 11,974.14
  4. Step 4: Simplify right side
    28,617.66x = 513,914,043.45
  5. Step 5: Solve for x
    x = 513,914,043.45/28,617.66
  6. Step 6: Final answer
    x = 17,957.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.