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Finding the Fourth Proportional to 21,379.78, 32,068.05 and 7,519.06

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Solution

The fourth proportional to 21,379.78, 32,068.05 and 7,519.06 is: 11,278.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,379.78 : 32,068.05 = 7,519.06 : x
  2. Step 2: Convert to fraction form
    21,379.78/32,068.05 = 7,519.06/x
  3. Step 3: Cross multiply
    21,379.78x = 32,068.05 × 7,519.06
  4. Step 4: Simplify right side
    21,379.78x = 241,121,592.03
  5. Step 5: Solve for x
    x = 241,121,592.03/21,379.78
  6. Step 6: Final answer
    x = 11,278.02

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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.