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Finding the Fourth Proportional to 18,491.68, 27,741.84 and 12,651.04

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Solution

The fourth proportional to 18,491.68, 27,741.84 and 12,651.04 is: 18,979.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,491.68 : 27,741.84 = 12,651.04 : x
  2. Step 2: Convert to fraction form
    18,491.68/27,741.84 = 12,651.04/x
  3. Step 3: Cross multiply
    18,491.68x = 27,741.84 × 12,651.04
  4. Step 4: Simplify right side
    18,491.68x = 350,963,127.51
  5. Step 5: Solve for x
    x = 350,963,127.51/18,491.68
  6. Step 6: Final answer
    x = 18,979.52

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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.