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Finding the Fourth Proportional to 12,148.70, 18,223.04 and 9,379.40

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Solution

The fourth proportional to 12,148.70, 18,223.04 and 9,379.40 is: 14,069.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,148.70 : 18,223.04 = 9,379.40 : x
  2. Step 2: Convert to fraction form
    12,148.70/18,223.04 = 9,379.40/x
  3. Step 3: Cross multiply
    12,148.70x = 18,223.04 × 9,379.40
  4. Step 4: Simplify right side
    12,148.70x = 170,921,181.38
  5. Step 5: Solve for x
    x = 170,921,181.38/12,148.70
  6. Step 6: Final answer
    x = 14,069.09

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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.