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Finding the Fourth Proportional to 18,209.71, 25,129.86 and 10,252.21

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Solution

The fourth proportional to 18,209.71, 25,129.86 and 10,252.21 is: 14,148.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,209.71 : 25,129.86 = 10,252.21 : x
  2. Step 2: Convert to fraction form
    18,209.71/25,129.86 = 10,252.21/x
  3. Step 3: Cross multiply
    18,209.71x = 25,129.86 × 10,252.21
  4. Step 4: Simplify right side
    18,209.71x = 257,636,601.99
  5. Step 5: Solve for x
    x = 257,636,601.99/18,209.71
  6. Step 6: Final answer
    x = 14,148.31

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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.