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Finding the Fourth Proportional to 18,495.78, 27,768.36 and 15,740.16

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Solution

The fourth proportional to 18,495.78, 27,768.36 and 15,740.16 is: 23,631.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,495.78 : 27,768.36 = 15,740.16 : x
  2. Step 2: Convert to fraction form
    18,495.78/27,768.36 = 15,740.16/x
  3. Step 3: Cross multiply
    18,495.78x = 27,768.36 × 15,740.16
  4. Step 4: Simplify right side
    18,495.78x = 437,078,429.34
  5. Step 5: Solve for x
    x = 437,078,429.34/18,495.78
  6. Step 6: Final answer
    x = 23,631.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.