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Finding the Fourth Proportional to 21,379.84, 32,074.62 and 7,339.32

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Solution

The fourth proportional to 21,379.84, 32,074.62 and 7,339.32 is: 11,010.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,379.84 : 32,074.62 = 7,339.32 : x
  2. Step 2: Convert to fraction form
    21,379.84/32,074.62 = 7,339.32/x
  3. Step 3: Cross multiply
    21,379.84x = 32,074.62 × 7,339.32
  4. Step 4: Simplify right side
    21,379.84x = 235,405,900.06
  5. Step 5: Solve for x
    x = 235,405,900.06/21,379.84
  6. Step 6: Final answer
    x = 11,010.65

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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.