Home / 5,815.47-8,724-2,117.28

Finding the Fourth Proportional to 5,815.47, 8,724 and 2,117.28

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Solution

The fourth proportional to 5,815.47, 8,724 and 2,117.28 is: 3,176.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,815.47 : 8,724 = 2,117.28 : x
  2. Step 2: Convert to fraction form
    5,815.47/8,724 = 2,117.28/x
  3. Step 3: Cross multiply
    5,815.47x = 8,724 × 2,117.28
  4. Step 4: Simplify right side
    5,815.47x = 18,471,150.72
  5. Step 5: Solve for x
    x = 18,471,150.72/5,815.47
  6. Step 6: Final answer
    x = 3,176.21

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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.