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Finding the Fourth Proportional to 5,840.48, 8,749.20 and 4,815.20

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Solution

The fourth proportional to 5,840.48, 8,749.20 and 4,815.20 is: 7,213.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,840.48 : 8,749.20 = 4,815.20 : x
  2. Step 2: Convert to fraction form
    5,840.48/8,749.20 = 4,815.20/x
  3. Step 3: Cross multiply
    5,840.48x = 8,749.20 × 4,815.20
  4. Step 4: Simplify right side
    5,840.48x = 42,129,147.84
  5. Step 5: Solve for x
    x = 42,129,147.84/5,840.48
  6. Step 6: Final answer
    x = 7,213.30

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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.