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Finding the Fourth Proportional to 12,666.71, 18,953.49 and 7,906.34

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Solution

The fourth proportional to 12,666.71, 18,953.49 and 7,906.34 is: 11,830.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,666.71 : 18,953.49 = 7,906.34 : x
  2. Step 2: Convert to fraction form
    12,666.71/18,953.49 = 7,906.34/x
  3. Step 3: Cross multiply
    12,666.71x = 18,953.49 × 7,906.34
  4. Step 4: Simplify right side
    12,666.71x = 149,852,736.13
  5. Step 5: Solve for x
    x = 149,852,736.13/12,666.71
  6. Step 6: Final answer
    x = 11,830.44

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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.