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Finding the Fourth Proportional to 21,379.54, 32,069.79 and 7,339.46

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Solution

The fourth proportional to 21,379.54, 32,069.79 and 7,339.46 is: 11,009.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,379.54 : 32,069.79 = 7,339.46 : x
  2. Step 2: Convert to fraction form
    21,379.54/32,069.79 = 7,339.46/x
  3. Step 3: Cross multiply
    21,379.54x = 32,069.79 × 7,339.46
  4. Step 4: Simplify right side
    21,379.54x = 235,374,940.91
  5. Step 5: Solve for x
    x = 235,374,940.91/21,379.54
  6. Step 6: Final answer
    x = 11,009.35

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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.