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Finding the Fourth Proportional to 18,208.71, 25,128.48 and 10,251.21

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Solution

The fourth proportional to 18,208.71, 25,128.48 and 10,251.21 is: 14,146.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,208.71 : 25,128.48 = 10,251.21 : x
  2. Step 2: Convert to fraction form
    18,208.71/25,128.48 = 10,251.21/x
  3. Step 3: Cross multiply
    18,208.71x = 25,128.48 × 10,251.21
  4. Step 4: Simplify right side
    18,208.71x = 257,597,325.46
  5. Step 5: Solve for x
    x = 257,597,325.46/18,208.71
  6. Step 6: Final answer
    x = 14,146.93

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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.