Home / 5,280.45-7,919.69-1,947.98

Finding the Fourth Proportional to 5,280.45, 7,919.69 and 1,947.98

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Solution

The fourth proportional to 5,280.45, 7,919.69 and 1,947.98 is: 2,921.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,280.45 : 7,919.69 = 1,947.98 : x
  2. Step 2: Convert to fraction form
    5,280.45/7,919.69 = 1,947.98/x
  3. Step 3: Cross multiply
    5,280.45x = 7,919.69 × 1,947.98
  4. Step 4: Simplify right side
    5,280.45x = 15,427,358.13
  5. Step 5: Solve for x
    x = 15,427,358.13/5,280.45
  6. Step 6: Final answer
    x = 2,921.60

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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.