Home / 5,389.60-8,084.40-2,105

Finding the Fourth Proportional to 5,389.60, 8,084.40 and 2,105

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Solution

The fourth proportional to 5,389.60, 8,084.40 and 2,105 is: 3,157.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,389.60 : 8,084.40 = 2,105 : x
  2. Step 2: Convert to fraction form
    5,389.60/8,084.40 = 2,105/x
  3. Step 3: Cross multiply
    5,389.60x = 8,084.40 × 2,105
  4. Step 4: Simplify right side
    5,389.60x = 17,017,662
  5. Step 5: Solve for x
    x = 17,017,662/5,389.60
  6. Step 6: Final answer
    x = 3,157.50

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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.