Home / 21,790.15-30,034.47-15,408.51

Finding the Fourth Proportional to 21,790.15, 30,034.47 and 15,408.51

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Solution

The fourth proportional to 21,790.15, 30,034.47 and 15,408.51 is: 21,238.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,790.15 : 30,034.47 = 15,408.51 : x
  2. Step 2: Convert to fraction form
    21,790.15/30,034.47 = 15,408.51/x
  3. Step 3: Cross multiply
    21,790.15x = 30,034.47 × 15,408.51
  4. Step 4: Simplify right side
    21,790.15x = 462,786,431.34
  5. Step 5: Solve for x
    x = 462,786,431.34/21,790.15
  6. Step 6: Final answer
    x = 21,238.33

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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.