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Finding the Fourth Proportional to 21,710.10, 32,564.53 and 6,919.90

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Solution

The fourth proportional to 21,710.10, 32,564.53 and 6,919.90 is: 10,379.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,710.10 : 32,564.53 = 6,919.90 : x
  2. Step 2: Convert to fraction form
    21,710.10/32,564.53 = 6,919.90/x
  3. Step 3: Cross multiply
    21,710.10x = 32,564.53 × 6,919.90
  4. Step 4: Simplify right side
    21,710.10x = 225,343,291.15
  5. Step 5: Solve for x
    x = 225,343,291.15/21,710.10
  6. Step 6: Final answer
    x = 10,379.65

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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.