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Finding the Fourth Proportional to 14,319, 21,479.22 and 5,085.72

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Solution

The fourth proportional to 14,319, 21,479.22 and 5,085.72 is: 7,628.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,319 : 21,479.22 = 5,085.72 : x
  2. Step 2: Convert to fraction form
    14,319/21,479.22 = 5,085.72/x
  3. Step 3: Cross multiply
    14,319x = 21,479.22 × 5,085.72
  4. Step 4: Simplify right side
    14,319x = 109,237,298.74
  5. Step 5: Solve for x
    x = 109,237,298.74/14,319
  6. Step 6: Final answer
    x = 7,628.84

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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.