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Finding the Fourth Proportional to 12,180.84, 18,271.08 and 3,972.84

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Solution

The fourth proportional to 12,180.84, 18,271.08 and 3,972.84 is: 5,959.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,180.84 : 18,271.08 = 3,972.84 : x
  2. Step 2: Convert to fraction form
    12,180.84/18,271.08 = 3,972.84/x
  3. Step 3: Cross multiply
    12,180.84x = 18,271.08 × 3,972.84
  4. Step 4: Simplify right side
    12,180.84x = 72,588,077.47
  5. Step 5: Solve for x
    x = 72,588,077.47/12,180.84
  6. Step 6: Final answer
    x = 5,959.20

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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.