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Finding the Fourth Proportional to 8,749.20, 13,138.20 and 5,840.40

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Solution

The fourth proportional to 8,749.20, 13,138.20 and 5,840.40 is: 8,770.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,749.20 : 13,138.20 = 5,840.40 : x
  2. Step 2: Convert to fraction form
    8,749.20/13,138.20 = 5,840.40/x
  3. Step 3: Cross multiply
    8,749.20x = 13,138.20 × 5,840.40
  4. Step 4: Simplify right side
    8,749.20x = 76,732,343.28
  5. Step 5: Solve for x
    x = 76,732,343.28/8,749.20
  6. Step 6: Final answer
    x = 8,770.21

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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.