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Finding the Fourth Proportional to 8,918.86, 12,308.03 and 5,382.07

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Solution

The fourth proportional to 8,918.86, 12,308.03 and 5,382.07 is: 7,427.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.86 : 12,308.03 = 5,382.07 : x
  2. Step 2: Convert to fraction form
    8,918.86/12,308.03 = 5,382.07/x
  3. Step 3: Cross multiply
    8,918.86x = 12,308.03 × 5,382.07
  4. Step 4: Simplify right side
    8,918.86x = 66,242,661.00
  5. Step 5: Solve for x
    x = 66,242,661.00/8,918.86
  6. Step 6: Final answer
    x = 7,427.26

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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.