Home / 5,515.47-8,271.96-1,620.18

Finding the Fourth Proportional to 5,515.47, 8,271.96 and 1,620.18

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Solution

The fourth proportional to 5,515.47, 8,271.96 and 1,620.18 is: 2,429.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,515.47 : 8,271.96 = 1,620.18 : x
  2. Step 2: Convert to fraction form
    5,515.47/8,271.96 = 1,620.18/x
  3. Step 3: Cross multiply
    5,515.47x = 8,271.96 × 1,620.18
  4. Step 4: Simplify right side
    5,515.47x = 13,402,064.15
  5. Step 5: Solve for x
    x = 13,402,064.15/5,515.47
  6. Step 6: Final answer
    x = 2,429.90

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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.