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Finding the Fourth Proportional to 14,478.53, 21,721.54 and 8,479.67

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Solution

The fourth proportional to 14,478.53, 21,721.54 and 8,479.67 is: 12,721.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,478.53 : 21,721.54 = 8,479.67 : x
  2. Step 2: Convert to fraction form
    14,478.53/21,721.54 = 8,479.67/x
  3. Step 3: Cross multiply
    14,478.53x = 21,721.54 × 8,479.67
  4. Step 4: Simplify right side
    14,478.53x = 184,191,491.09
  5. Step 5: Solve for x
    x = 184,191,491.09/14,478.53
  6. Step 6: Final answer
    x = 12,721.70

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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.