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Finding the Fourth Proportional to 11,840.40, 17,760.96 and 5,603.40

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Solution

The fourth proportional to 11,840.40, 17,760.96 and 5,603.40 is: 8,405.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,840.40 : 17,760.96 = 5,603.40 : x
  2. Step 2: Convert to fraction form
    11,840.40/17,760.96 = 5,603.40/x
  3. Step 3: Cross multiply
    11,840.40x = 17,760.96 × 5,603.40
  4. Step 4: Simplify right side
    11,840.40x = 99,521,763.26
  5. Step 5: Solve for x
    x = 99,521,763.26/11,840.40
  6. Step 6: Final answer
    x = 8,405.27

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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.