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Finding the Fourth Proportional to 30,615.71, 42,249.65 and 17,186.99

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Solution

The fourth proportional to 30,615.71, 42,249.65 and 17,186.99 is: 23,718.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,615.71 : 42,249.65 = 17,186.99 : x
  2. Step 2: Convert to fraction form
    30,615.71/42,249.65 = 17,186.99/x
  3. Step 3: Cross multiply
    30,615.71x = 42,249.65 × 17,186.99
  4. Step 4: Simplify right side
    30,615.71x = 726,144,014.87
  5. Step 5: Solve for x
    x = 726,144,014.87/30,615.71
  6. Step 6: Final answer
    x = 23,718.02

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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.