Home / 21,456.44-29,582.28-13,889.36

Finding the Fourth Proportional to 21,456.44, 29,582.28 and 13,889.36

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Solution

The fourth proportional to 21,456.44, 29,582.28 and 13,889.36 is: 19,149.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,456.44 : 29,582.28 = 13,889.36 : x
  2. Step 2: Convert to fraction form
    21,456.44/29,582.28 = 13,889.36/x
  3. Step 3: Cross multiply
    21,456.44x = 29,582.28 × 13,889.36
  4. Step 4: Simplify right side
    21,456.44x = 410,878,936.54
  5. Step 5: Solve for x
    x = 410,878,936.54/21,456.44
  6. Step 6: Final answer
    x = 19,149.45

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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.