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Finding the Fourth Proportional to 8,405.64, 11,531.37 and 7,903.08

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Solution

The fourth proportional to 8,405.64, 11,531.37 and 7,903.08 is: 10,841.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,405.64 : 11,531.37 = 7,903.08 : x
  2. Step 2: Convert to fraction form
    8,405.64/11,531.37 = 7,903.08/x
  3. Step 3: Cross multiply
    8,405.64x = 11,531.37 × 7,903.08
  4. Step 4: Simplify right side
    8,405.64x = 91,133,339.62
  5. Step 5: Solve for x
    x = 91,133,339.62/8,405.64
  6. Step 6: Final answer
    x = 10,841.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.