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Finding the Fourth Proportional to 19,291.50, 26,644.14 and 12,992.94

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Solution

The fourth proportional to 19,291.50, 26,644.14 and 12,992.94 is: 17,944.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,291.50 : 26,644.14 = 12,992.94 : x
  2. Step 2: Convert to fraction form
    19,291.50/26,644.14 = 12,992.94/x
  3. Step 3: Cross multiply
    19,291.50x = 26,644.14 × 12,992.94
  4. Step 4: Simplify right side
    19,291.50x = 346,185,712.37
  5. Step 5: Solve for x
    x = 346,185,712.37/19,291.50
  6. Step 6: Final answer
    x = 17,944.99

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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.