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Finding the Fourth Proportional to 18,145.68, 25,039.17 and 10,188.78

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Solution

The fourth proportional to 18,145.68, 25,039.17 and 10,188.78 is: 14,059.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,145.68 : 25,039.17 = 10,188.78 : x
  2. Step 2: Convert to fraction form
    18,145.68/25,039.17 = 10,188.78/x
  3. Step 3: Cross multiply
    18,145.68x = 25,039.17 × 10,188.78
  4. Step 4: Simplify right side
    18,145.68x = 255,118,594.51
  5. Step 5: Solve for x
    x = 255,118,594.51/18,145.68
  6. Step 6: Final answer
    x = 14,059.47

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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.