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Finding the Fourth Proportional to 11,603.40, 17,405.10 and 2,838.20

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Solution

The fourth proportional to 11,603.40, 17,405.10 and 2,838.20 is: 4,257.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,603.40 : 17,405.10 = 2,838.20 : x
  2. Step 2: Convert to fraction form
    11,603.40/17,405.10 = 2,838.20/x
  3. Step 3: Cross multiply
    11,603.40x = 17,405.10 × 2,838.20
  4. Step 4: Simplify right side
    11,603.40x = 49,399,154.82
  5. Step 5: Solve for x
    x = 49,399,154.82/11,603.40
  6. Step 6: Final answer
    x = 4,257.30

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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.