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Finding the Fourth Proportional to 13,323, 19,985.04 and 4,089

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Solution

The fourth proportional to 13,323, 19,985.04 and 4,089 is: 6,133.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,323 : 19,985.04 = 4,089 : x
  2. Step 2: Convert to fraction form
    13,323/19,985.04 = 4,089/x
  3. Step 3: Cross multiply
    13,323x = 19,985.04 × 4,089
  4. Step 4: Simplify right side
    13,323x = 81,718,828.56
  5. Step 5: Solve for x
    x = 81,718,828.56/13,323
  6. Step 6: Final answer
    x = 6,133.67

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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.