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Finding the Fourth Proportional to 19,018.60, 28,532 and 9,659.88

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Solution

The fourth proportional to 19,018.60, 28,532 and 9,659.88 is: 14,491.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,018.60 : 28,532 = 9,659.88 : x
  2. Step 2: Convert to fraction form
    19,018.60/28,532 = 9,659.88/x
  3. Step 3: Cross multiply
    19,018.60x = 28,532 × 9,659.88
  4. Step 4: Simplify right side
    19,018.60x = 275,615,696.16
  5. Step 5: Solve for x
    x = 275,615,696.16/19,018.60
  6. Step 6: Final answer
    x = 14,491.90

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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.