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Finding the Fourth Proportional to 18,321.84, 25,284.06 and 9,938.34

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Solution

The fourth proportional to 18,321.84, 25,284.06 and 9,938.34 is: 13,714.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,321.84 : 25,284.06 = 9,938.34 : x
  2. Step 2: Convert to fraction form
    18,321.84/25,284.06 = 9,938.34/x
  3. Step 3: Cross multiply
    18,321.84x = 25,284.06 × 9,938.34
  4. Step 4: Simplify right side
    18,321.84x = 251,281,584.86
  5. Step 5: Solve for x
    x = 251,281,584.86/18,321.84
  6. Step 6: Final answer
    x = 13,714.87

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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.