Home / 21,112.33-29,130.44-13,458.51

Finding the Fourth Proportional to 21,112.33, 29,130.44 and 13,458.51

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Solution

The fourth proportional to 21,112.33, 29,130.44 and 13,458.51 is: 18,569.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,112.33 : 29,130.44 = 13,458.51 : x
  2. Step 2: Convert to fraction form
    21,112.33/29,130.44 = 13,458.51/x
  3. Step 3: Cross multiply
    21,112.33x = 29,130.44 × 13,458.51
  4. Step 4: Simplify right side
    21,112.33x = 392,052,172.39
  5. Step 5: Solve for x
    x = 392,052,172.39/21,112.33
  6. Step 6: Final answer
    x = 18,569.82

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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.