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Finding the Fourth Proportional to 19,339.78, 26,673.69 and 12,964.18

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Solution

The fourth proportional to 19,339.78, 26,673.69 and 12,964.18 is: 17,880.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,339.78 : 26,673.69 = 12,964.18 : x
  2. Step 2: Convert to fraction form
    19,339.78/26,673.69 = 12,964.18/x
  3. Step 3: Cross multiply
    19,339.78x = 26,673.69 × 12,964.18
  4. Step 4: Simplify right side
    19,339.78x = 345,802,518.42
  5. Step 5: Solve for x
    x = 345,802,518.42/19,339.78
  6. Step 6: Final answer
    x = 17,880.37

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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.