Home / 5,318.99-7,979.63-1,621.50

Finding the Fourth Proportional to 5,318.99, 7,979.63 and 1,621.50

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Solution

The fourth proportional to 5,318.99, 7,979.63 and 1,621.50 is: 2,432.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,318.99 : 7,979.63 = 1,621.50 : x
  2. Step 2: Convert to fraction form
    5,318.99/7,979.63 = 1,621.50/x
  3. Step 3: Cross multiply
    5,318.99x = 7,979.63 × 1,621.50
  4. Step 4: Simplify right side
    5,318.99x = 12,938,961.94
  5. Step 5: Solve for x
    x = 12,938,961.94/5,318.99
  6. Step 6: Final answer
    x = 2,432.60

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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.