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Finding the Fourth Proportional to 18,819.24, 25,970.88 and 10,321.22

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Solution

The fourth proportional to 18,819.24, 25,970.88 and 10,321.22 is: 14,243.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.24 : 25,970.88 = 10,321.22 : x
  2. Step 2: Convert to fraction form
    18,819.24/25,970.88 = 10,321.22/x
  3. Step 3: Cross multiply
    18,819.24x = 25,970.88 × 10,321.22
  4. Step 4: Simplify right side
    18,819.24x = 268,051,211.65
  5. Step 5: Solve for x
    x = 268,051,211.65/18,819.24
  6. Step 6: Final answer
    x = 14,243.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.