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Finding the Fourth Proportional to 12,292.78, 18,439.08 and 3,058.78

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Solution

The fourth proportional to 12,292.78, 18,439.08 and 3,058.78 is: 4,588.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,292.78 : 18,439.08 = 3,058.78 : x
  2. Step 2: Convert to fraction form
    12,292.78/18,439.08 = 3,058.78/x
  3. Step 3: Cross multiply
    12,292.78x = 18,439.08 × 3,058.78
  4. Step 4: Simplify right side
    12,292.78x = 56,401,089.12
  5. Step 5: Solve for x
    x = 56,401,089.12/12,292.78
  6. Step 6: Final answer
    x = 4,588.15

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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.