Home / 30,936.15-42,726.69-20,906.01

Finding the Fourth Proportional to 30,936.15, 42,726.69 and 20,906.01

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Solution

The fourth proportional to 30,936.15, 42,726.69 and 20,906.01 is: 28,873.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,936.15 : 42,726.69 = 20,906.01 : x
  2. Step 2: Convert to fraction form
    30,936.15/42,726.69 = 20,906.01/x
  3. Step 3: Cross multiply
    30,936.15x = 42,726.69 × 20,906.01
  4. Step 4: Simplify right side
    30,936.15x = 893,244,608.41
  5. Step 5: Solve for x
    x = 893,244,608.41/30,936.15
  6. Step 6: Final answer
    x = 28,873.81

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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.