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Finding the Fourth Proportional to 21,835.39, 32,725.68 and 9,340.72

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Solution

The fourth proportional to 21,835.39, 32,725.68 and 9,340.72 is: 13,999.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,835.39 : 32,725.68 = 9,340.72 : x
  2. Step 2: Convert to fraction form
    21,835.39/32,725.68 = 9,340.72/x
  3. Step 3: Cross multiply
    21,835.39x = 32,725.68 × 9,340.72
  4. Step 4: Simplify right side
    21,835.39x = 305,681,413.69
  5. Step 5: Solve for x
    x = 305,681,413.69/21,835.39
  6. Step 6: Final answer
    x = 13,999.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.