Home / 5,280.32-7,289.12-3,156.56

Finding the Fourth Proportional to 5,280.32, 7,289.12 and 3,156.56

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Solution

The fourth proportional to 5,280.32, 7,289.12 and 3,156.56 is: 4,357.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,280.32 : 7,289.12 = 3,156.56 : x
  2. Step 2: Convert to fraction form
    5,280.32/7,289.12 = 3,156.56/x
  3. Step 3: Cross multiply
    5,280.32x = 7,289.12 × 3,156.56
  4. Step 4: Simplify right side
    5,280.32x = 23,008,544.63
  5. Step 5: Solve for x
    x = 23,008,544.63/5,280.32
  6. Step 6: Final answer
    x = 4,357.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.