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Finding the Fourth Proportional to 21,671.79, 32,512.23 and 12,316.14

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Solution

The fourth proportional to 21,671.79, 32,512.23 and 12,316.14 is: 18,476.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,671.79 : 32,512.23 = 12,316.14 : x
  2. Step 2: Convert to fraction form
    21,671.79/32,512.23 = 12,316.14/x
  3. Step 3: Cross multiply
    21,671.79x = 32,512.23 × 12,316.14
  4. Step 4: Simplify right side
    21,671.79x = 400,425,176.39
  5. Step 5: Solve for x
    x = 400,425,176.39/21,671.79
  6. Step 6: Final answer
    x = 18,476.79

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1.5x scale

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.