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Finding the Fourth Proportional to 12,483.84, 18,719.49 and 4,160.91

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Solution

The fourth proportional to 12,483.84, 18,719.49 and 4,160.91 is: 6,239.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,483.84 : 18,719.49 = 4,160.91 : x
  2. Step 2: Convert to fraction form
    12,483.84/18,719.49 = 4,160.91/x
  3. Step 3: Cross multiply
    12,483.84x = 18,719.49 × 4,160.91
  4. Step 4: Simplify right side
    12,483.84x = 77,890,113.14
  5. Step 5: Solve for x
    x = 77,890,113.14/12,483.84
  6. Step 6: Final answer
    x = 6,239.28

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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.