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Finding the Fourth Proportional to 14,043.83, 21,065.69 and 5,721.99

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Solution

The fourth proportional to 14,043.83, 21,065.69 and 5,721.99 is: 8,582.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,043.83 : 21,065.69 = 5,721.99 : x
  2. Step 2: Convert to fraction form
    14,043.83/21,065.69 = 5,721.99/x
  3. Step 3: Cross multiply
    14,043.83x = 21,065.69 × 5,721.99
  4. Step 4: Simplify right side
    14,043.83x = 120,537,638.91
  5. Step 5: Solve for x
    x = 120,537,638.91/14,043.83
  6. Step 6: Final answer
    x = 8,582.96

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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.