Home / 28,133.66-42,215.16-20,406.26

Finding the Fourth Proportional to 28,133.66, 42,215.16 and 20,406.26

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Solution

The fourth proportional to 28,133.66, 42,215.16 and 20,406.26 is: 30,620.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,133.66 : 42,215.16 = 20,406.26 : x
  2. Step 2: Convert to fraction form
    28,133.66/42,215.16 = 20,406.26/x
  3. Step 3: Cross multiply
    28,133.66x = 42,215.16 × 20,406.26
  4. Step 4: Simplify right side
    28,133.66x = 861,453,530.90
  5. Step 5: Solve for x
    x = 861,453,530.90/28,133.66
  6. Step 6: Final answer
    x = 30,620.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.