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Finding the Fourth Proportional to 9,339.84, 12,889.08 and 5,091

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Solution

The fourth proportional to 9,339.84, 12,889.08 and 5,091 is: 7,025.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,339.84 : 12,889.08 = 5,091 : x
  2. Step 2: Convert to fraction form
    9,339.84/12,889.08 = 5,091/x
  3. Step 3: Cross multiply
    9,339.84x = 12,889.08 × 5,091
  4. Step 4: Simplify right side
    9,339.84x = 65,618,306.28
  5. Step 5: Solve for x
    x = 65,618,306.28/9,339.84
  6. Step 6: Final answer
    x = 7,025.63

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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.