Home / 8,720.66-12,030.54-5,181.86

Finding the Fourth Proportional to 8,720.66, 12,030.54 and 5,181.86

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Solution

The fourth proportional to 8,720.66, 12,030.54 and 5,181.86 is: 7,148.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.66 : 12,030.54 = 5,181.86 : x
  2. Step 2: Convert to fraction form
    8,720.66/12,030.54 = 5,181.86/x
  3. Step 3: Cross multiply
    8,720.66x = 12,030.54 × 5,181.86
  4. Step 4: Simplify right side
    8,720.66x = 62,340,574.00
  5. Step 5: Solve for x
    x = 62,340,574.00/8,720.66
  6. Step 6: Final answer
    x = 7,148.61

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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.