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Finding the Fourth Proportional to 19,719, 27,212.22 and 11,340.36

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Solution

The fourth proportional to 19,719, 27,212.22 and 11,340.36 is: 15,649.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,719 : 27,212.22 = 11,340.36 : x
  2. Step 2: Convert to fraction form
    19,719/27,212.22 = 11,340.36/x
  3. Step 3: Cross multiply
    19,719x = 27,212.22 × 11,340.36
  4. Step 4: Simplify right side
    19,719x = 308,596,371.20
  5. Step 5: Solve for x
    x = 308,596,371.20/19,719
  6. Step 6: Final answer
    x = 15,649.70

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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.