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Finding the Fourth Proportional to 18,204.71, 25,145.69 and 13,929.71

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Solution

The fourth proportional to 18,204.71, 25,145.69 and 13,929.71 is: 19,240.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,204.71 : 25,145.69 = 13,929.71 : x
  2. Step 2: Convert to fraction form
    18,204.71/25,145.69 = 13,929.71/x
  3. Step 3: Cross multiply
    18,204.71x = 25,145.69 × 13,929.71
  4. Step 4: Simplify right side
    18,204.71x = 350,271,974.07
  5. Step 5: Solve for x
    x = 350,271,974.07/18,204.71
  6. Step 6: Final answer
    x = 19,240.74

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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.