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Finding the Fourth Proportional to 18,916.67, 26,110.45 and 12,647.27

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Solution

The fourth proportional to 18,916.67, 26,110.45 and 12,647.27 is: 17,456.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,916.67 : 26,110.45 = 12,647.27 : x
  2. Step 2: Convert to fraction form
    18,916.67/26,110.45 = 12,647.27/x
  3. Step 3: Cross multiply
    18,916.67x = 26,110.45 × 12,647.27
  4. Step 4: Simplify right side
    18,916.67x = 330,225,992.06
  5. Step 5: Solve for x
    x = 330,225,992.06/18,916.67
  6. Step 6: Final answer
    x = 17,456.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.