Home / 5,319.20-7,979.16-1,621.70

Finding the Fourth Proportional to 5,319.20, 7,979.16 and 1,621.70

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Solution

The fourth proportional to 5,319.20, 7,979.16 and 1,621.70 is: 2,432.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,319.20 : 7,979.16 = 1,621.70 : x
  2. Step 2: Convert to fraction form
    5,319.20/7,979.16 = 1,621.70/x
  3. Step 3: Cross multiply
    5,319.20x = 7,979.16 × 1,621.70
  4. Step 4: Simplify right side
    5,319.20x = 12,939,803.77
  5. Step 5: Solve for x
    x = 12,939,803.77/5,319.20
  6. Step 6: Final answer
    x = 2,432.66

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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.