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Finding the Fourth Proportional to 9,339.76, 12,889.16 and 5,361.65

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Solution

The fourth proportional to 9,339.76, 12,889.16 and 5,361.65 is: 7,399.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,339.76 : 12,889.16 = 5,361.65 : x
  2. Step 2: Convert to fraction form
    9,339.76/12,889.16 = 5,361.65/x
  3. Step 3: Cross multiply
    9,339.76x = 12,889.16 × 5,361.65
  4. Step 4: Simplify right side
    9,339.76x = 69,107,164.71
  5. Step 5: Solve for x
    x = 69,107,164.71/9,339.76
  6. Step 6: Final answer
    x = 7,399.24

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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.