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Finding the Fourth Proportional to 19,309.88, 26,629.40 and 12,600.65

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Solution

The fourth proportional to 19,309.88, 26,629.40 and 12,600.65 is: 17,376.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,309.88 : 26,629.40 = 12,600.65 : x
  2. Step 2: Convert to fraction form
    19,309.88/26,629.40 = 12,600.65/x
  3. Step 3: Cross multiply
    19,309.88x = 26,629.40 × 12,600.65
  4. Step 4: Simplify right side
    19,309.88x = 335,547,552.96
  5. Step 5: Solve for x
    x = 335,547,552.96/19,309.88
  6. Step 6: Final answer
    x = 17,376.99

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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.