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Finding the Fourth Proportional to 12,478.51, 18,721.01 and 6,238.27

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Solution

The fourth proportional to 12,478.51, 18,721.01 and 6,238.27 is: 9,359.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,478.51 : 18,721.01 = 6,238.27 : x
  2. Step 2: Convert to fraction form
    12,478.51/18,721.01 = 6,238.27/x
  3. Step 3: Cross multiply
    12,478.51x = 18,721.01 × 6,238.27
  4. Step 4: Simplify right side
    12,478.51x = 116,786,715.05
  5. Step 5: Solve for x
    x = 116,786,715.05/12,478.51
  6. Step 6: Final answer
    x = 9,359.03

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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.