Home / 20,112.15-30,032.78-16,421.59

Finding the Fourth Proportional to 20,112.15, 30,032.78 and 16,421.59

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Solution

The fourth proportional to 20,112.15, 30,032.78 and 16,421.59 is: 24,521.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,112.15 : 30,032.78 = 16,421.59 : x
  2. Step 2: Convert to fraction form
    20,112.15/30,032.78 = 16,421.59/x
  3. Step 3: Cross multiply
    20,112.15x = 30,032.78 × 16,421.59
  4. Step 4: Simplify right side
    20,112.15x = 493,185,965.69
  5. Step 5: Solve for x
    x = 493,185,965.69/20,112.15
  6. Step 6: Final answer
    x = 24,521.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.