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Finding the Fourth Proportional to 12,757.16, 19,133.58 and 3,521

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Solution

The fourth proportional to 12,757.16, 19,133.58 and 3,521 is: 5,280.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,757.16 : 19,133.58 = 3,521 : x
  2. Step 2: Convert to fraction form
    12,757.16/19,133.58 = 3,521/x
  3. Step 3: Cross multiply
    12,757.16x = 19,133.58 × 3,521
  4. Step 4: Simplify right side
    12,757.16x = 67,369,335.18
  5. Step 5: Solve for x
    x = 67,369,335.18/12,757.16
  6. Step 6: Final answer
    x = 5,280.90

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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.