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Finding the Fourth Proportional to 30,918.13, 42,667.02 and 17,489.09

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Solution

The fourth proportional to 30,918.13, 42,667.02 and 17,489.09 is: 24,134.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,918.13 : 42,667.02 = 17,489.09 : x
  2. Step 2: Convert to fraction form
    30,918.13/42,667.02 = 17,489.09/x
  3. Step 3: Cross multiply
    30,918.13x = 42,667.02 × 17,489.09
  4. Step 4: Simplify right side
    30,918.13x = 746,207,352.81
  5. Step 5: Solve for x
    x = 746,207,352.81/30,918.13
  6. Step 6: Final answer
    x = 24,134.94

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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.