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Finding the Fourth Proportional to 8,959.97, 12,361.86 and 4,980.31

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Solution

The fourth proportional to 8,959.97, 12,361.86 and 4,980.31 is: 6,871.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,959.97 : 12,361.86 = 4,980.31 : x
  2. Step 2: Convert to fraction form
    8,959.97/12,361.86 = 4,980.31/x
  3. Step 3: Cross multiply
    8,959.97x = 12,361.86 × 4,980.31
  4. Step 4: Simplify right side
    8,959.97x = 61,565,894.98
  5. Step 5: Solve for x
    x = 61,565,894.98/8,959.97
  6. Step 6: Final answer
    x = 6,871.22

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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.