Home / 8,720.82-12,030.47-5,181.53

Finding the Fourth Proportional to 8,720.82, 12,030.47 and 5,181.53

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Solution

The fourth proportional to 8,720.82, 12,030.47 and 5,181.53 is: 7,147.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.82 : 12,030.47 = 5,181.53 : x
  2. Step 2: Convert to fraction form
    8,720.82/12,030.47 = 5,181.53/x
  3. Step 3: Cross multiply
    8,720.82x = 12,030.47 × 5,181.53
  4. Step 4: Simplify right side
    8,720.82x = 62,336,155.16
  5. Step 5: Solve for x
    x = 62,336,155.16/8,720.82
  6. Step 6: Final answer
    x = 7,147.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.