Home / 5,817.15-8,720.28-2,118.45

Finding the Fourth Proportional to 5,817.15, 8,720.28 and 2,118.45

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Solution

The fourth proportional to 5,817.15, 8,720.28 and 2,118.45 is: 3,175.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,817.15 : 8,720.28 = 2,118.45 : x
  2. Step 2: Convert to fraction form
    5,817.15/8,720.28 = 2,118.45/x
  3. Step 3: Cross multiply
    5,817.15x = 8,720.28 × 2,118.45
  4. Step 4: Simplify right side
    5,817.15x = 18,473,477.17
  5. Step 5: Solve for x
    x = 18,473,477.17/5,817.15
  6. Step 6: Final answer
    x = 3,175.69

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1.5x scale

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.