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Finding the Fourth Proportional to 8,433.86, 11,639.63 and 5,078.63

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Solution

The fourth proportional to 8,433.86, 11,639.63 and 5,078.63 is: 7,009.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,433.86 : 11,639.63 = 5,078.63 : x
  2. Step 2: Convert to fraction form
    8,433.86/11,639.63 = 5,078.63/x
  3. Step 3: Cross multiply
    8,433.86x = 11,639.63 × 5,078.63
  4. Step 4: Simplify right side
    8,433.86x = 59,113,415.90
  5. Step 5: Solve for x
    x = 59,113,415.90/8,433.86
  6. Step 6: Final answer
    x = 7,009.06

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1.5x scale

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.