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Finding the Fourth Proportional to 18,487.42, 25,512.07 and 10,530.78

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Solution

The fourth proportional to 18,487.42, 25,512.07 and 10,530.78 is: 14,532.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,487.42 : 25,512.07 = 10,530.78 : x
  2. Step 2: Convert to fraction form
    18,487.42/25,512.07 = 10,530.78/x
  3. Step 3: Cross multiply
    18,487.42x = 25,512.07 × 10,530.78
  4. Step 4: Simplify right side
    18,487.42x = 268,661,996.51
  5. Step 5: Solve for x
    x = 268,661,996.51/18,487.42
  6. Step 6: Final answer
    x = 14,532.15

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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.