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Finding the Fourth Proportional to 21,423.69, 32,129.33 and 8,273.07

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Solution

The fourth proportional to 21,423.69, 32,129.33 and 8,273.07 is: 12,407.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,423.69 : 32,129.33 = 8,273.07 : x
  2. Step 2: Convert to fraction form
    21,423.69/32,129.33 = 8,273.07/x
  3. Step 3: Cross multiply
    21,423.69x = 32,129.33 × 8,273.07
  4. Step 4: Simplify right side
    21,423.69x = 265,808,154.78
  5. Step 5: Solve for x
    x = 265,808,154.78/21,423.69
  6. Step 6: Final answer
    x = 12,407.21

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.