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Finding the Fourth Proportional to 18,321.74, 25,277.27 and 11,148.74

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Solution

The fourth proportional to 18,321.74, 25,277.27 and 11,148.74 is: 15,381.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,321.74 : 25,277.27 = 11,148.74 : x
  2. Step 2: Convert to fraction form
    18,321.74/25,277.27 = 11,148.74/x
  3. Step 3: Cross multiply
    18,321.74x = 25,277.27 × 11,148.74
  4. Step 4: Simplify right side
    18,321.74x = 281,809,655.40
  5. Step 5: Solve for x
    x = 281,809,655.40/18,321.74
  6. Step 6: Final answer
    x = 15,381.16

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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.