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Finding the Fourth Proportional to 11,345.80, 17,018.74 and 3,448.40

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Solution

The fourth proportional to 11,345.80, 17,018.74 and 3,448.40 is: 5,172.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,345.80 : 17,018.74 = 3,448.40 : x
  2. Step 2: Convert to fraction form
    11,345.80/17,018.74 = 3,448.40/x
  3. Step 3: Cross multiply
    11,345.80x = 17,018.74 × 3,448.40
  4. Step 4: Simplify right side
    11,345.80x = 58,687,423.02
  5. Step 5: Solve for x
    x = 58,687,423.02/11,345.80
  6. Step 6: Final answer
    x = 5,172.61

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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.