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Finding the Fourth Proportional to 21,413.30, 32,123.86 and 6,621.21

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Solution

The fourth proportional to 21,413.30, 32,123.86 and 6,621.21 is: 9,933.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,413.30 : 32,123.86 = 6,621.21 : x
  2. Step 2: Convert to fraction form
    21,413.30/32,123.86 = 6,621.21/x
  3. Step 3: Cross multiply
    21,413.30x = 32,123.86 × 6,621.21
  4. Step 4: Simplify right side
    21,413.30x = 212,698,806.52
  5. Step 5: Solve for x
    x = 212,698,806.52/21,413.30
  6. Step 6: Final answer
    x = 9,933.03

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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.