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Finding the Fourth Proportional to 18,878.78, 26,052.14 and 10,812.16

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Solution

The fourth proportional to 18,878.78, 26,052.14 and 10,812.16 is: 14,920.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,878.78 : 26,052.14 = 10,812.16 : x
  2. Step 2: Convert to fraction form
    18,878.78/26,052.14 = 10,812.16/x
  3. Step 3: Cross multiply
    18,878.78x = 26,052.14 × 10,812.16
  4. Step 4: Simplify right side
    18,878.78x = 281,679,906.02
  5. Step 5: Solve for x
    x = 281,679,906.02/18,878.78
  6. Step 6: Final answer
    x = 14,920.45

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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.