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Finding the Fourth Proportional to 8,959.75, 12,364.31 and 4,980.35

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Solution

The fourth proportional to 8,959.75, 12,364.31 and 4,980.35 is: 6,872.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,959.75 : 12,364.31 = 4,980.35 : x
  2. Step 2: Convert to fraction form
    8,959.75/12,364.31 = 4,980.35/x
  3. Step 3: Cross multiply
    8,959.75x = 12,364.31 × 4,980.35
  4. Step 4: Simplify right side
    8,959.75x = 61,578,566.41
  5. Step 5: Solve for x
    x = 61,578,566.41/8,959.75
  6. Step 6: Final answer
    x = 6,872.80

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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.