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Finding the Fourth Proportional to 13,487.81, 18,603.18 and 8,942.27

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Solution

The fourth proportional to 13,487.81, 18,603.18 and 8,942.27 is: 12,333.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,487.81 : 18,603.18 = 8,942.27 : x
  2. Step 2: Convert to fraction form
    13,487.81/18,603.18 = 8,942.27/x
  3. Step 3: Cross multiply
    13,487.81x = 18,603.18 × 8,942.27
  4. Step 4: Simplify right side
    13,487.81x = 166,354,565.40
  5. Step 5: Solve for x
    x = 166,354,565.40/13,487.81
  6. Step 6: Final answer
    x = 12,333.70

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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.