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Finding the Fourth Proportional to 5,339.28, 8,008.56 and 4,978.56

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Solution

The fourth proportional to 5,339.28, 8,008.56 and 4,978.56 is: 7,467.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,339.28 : 8,008.56 = 4,978.56 : x
  2. Step 2: Convert to fraction form
    5,339.28/8,008.56 = 4,978.56/x
  3. Step 3: Cross multiply
    5,339.28x = 8,008.56 × 4,978.56
  4. Step 4: Simplify right side
    5,339.28x = 39,871,096.47
  5. Step 5: Solve for x
    x = 39,871,096.47/5,339.28
  6. Step 6: Final answer
    x = 7,467.50

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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.