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Finding the Fourth Proportional to 5,678.55, 8,515.02 and 2,118.18

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Solution

The fourth proportional to 5,678.55, 8,515.02 and 2,118.18 is: 3,176.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,678.55 : 8,515.02 = 2,118.18 : x
  2. Step 2: Convert to fraction form
    5,678.55/8,515.02 = 2,118.18/x
  3. Step 3: Cross multiply
    5,678.55x = 8,515.02 × 2,118.18
  4. Step 4: Simplify right side
    5,678.55x = 18,036,345.06
  5. Step 5: Solve for x
    x = 18,036,345.06/5,678.55
  6. Step 6: Final answer
    x = 3,176.22

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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.