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Finding the Fourth Proportional to 18,819.90, 25,970.88 and 10,321.58

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Solution

The fourth proportional to 18,819.90, 25,970.88 and 10,321.58 is: 14,243.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,819.90 : 25,970.88 = 10,321.58 : x
  2. Step 2: Convert to fraction form
    18,819.90/25,970.88 = 10,321.58/x
  3. Step 3: Cross multiply
    18,819.90x = 25,970.88 × 10,321.58
  4. Step 4: Simplify right side
    18,819.90x = 268,060,515.59
  5. Step 5: Solve for x
    x = 268,060,515.59/18,819.90
  6. Step 6: Final answer
    x = 14,243.46

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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.