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Finding the Fourth Proportional to 12,320.63, 18,480.95 and 7,384.09

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Solution

The fourth proportional to 12,320.63, 18,480.95 and 7,384.09 is: 11,076.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,320.63 : 18,480.95 = 7,384.09 : x
  2. Step 2: Convert to fraction form
    12,320.63/18,480.95 = 7,384.09/x
  3. Step 3: Cross multiply
    12,320.63x = 18,480.95 × 7,384.09
  4. Step 4: Simplify right side
    12,320.63x = 136,464,998.09
  5. Step 5: Solve for x
    x = 136,464,998.09/12,320.63
  6. Step 6: Final answer
    x = 11,076.14

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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.