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Finding the Fourth Proportional to 30,616.71, 42,251.02 and 17,187.99

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Solution

The fourth proportional to 30,616.71, 42,251.02 and 17,187.99 is: 23,719.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,616.71 : 42,251.02 = 17,187.99 : x
  2. Step 2: Convert to fraction form
    30,616.71/42,251.02 = 17,187.99/x
  3. Step 3: Cross multiply
    30,616.71x = 42,251.02 × 17,187.99
  4. Step 4: Simplify right side
    30,616.71x = 726,210,109.25
  5. Step 5: Solve for x
    x = 726,210,109.25/30,616.71
  6. Step 6: Final answer
    x = 23,719.40

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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.