Home / 21,171.84-29,214.24-12,218.40

Finding the Fourth Proportional to 21,171.84, 29,214.24 and 12,218.40

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Solution

The fourth proportional to 21,171.84, 29,214.24 and 12,218.40 is: 16,859.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,171.84 : 29,214.24 = 12,218.40 : x
  2. Step 2: Convert to fraction form
    21,171.84/29,214.24 = 12,218.40/x
  3. Step 3: Cross multiply
    21,171.84x = 29,214.24 × 12,218.40
  4. Step 4: Simplify right side
    21,171.84x = 356,951,270.02
  5. Step 5: Solve for x
    x = 356,951,270.02/21,171.84
  6. Step 6: Final answer
    x = 16,859.72

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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.