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Finding the Fourth Proportional to 7,959.20, 11,880.54 and 7,380.95

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Solution

The fourth proportional to 7,959.20, 11,880.54 and 7,380.95 is: 11,017.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,959.20 : 11,880.54 = 7,380.95 : x
  2. Step 2: Convert to fraction form
    7,959.20/11,880.54 = 7,380.95/x
  3. Step 3: Cross multiply
    7,959.20x = 11,880.54 × 7,380.95
  4. Step 4: Simplify right side
    7,959.20x = 87,689,612.31
  5. Step 5: Solve for x
    x = 87,689,612.31/7,959.20
  6. Step 6: Final answer
    x = 11,017.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.