Home / 28,142.06-42,198.66-9,415.40

Finding the Fourth Proportional to 28,142.06, 42,198.66 and 9,415.40

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Solution

The fourth proportional to 28,142.06, 42,198.66 and 9,415.40 is: 14,118.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,142.06 : 42,198.66 = 9,415.40 : x
  2. Step 2: Convert to fraction form
    28,142.06/42,198.66 = 9,415.40/x
  3. Step 3: Cross multiply
    28,142.06x = 42,198.66 × 9,415.40
  4. Step 4: Simplify right side
    28,142.06x = 397,317,263.36
  5. Step 5: Solve for x
    x = 397,317,263.36/28,142.06
  6. Step 6: Final answer
    x = 14,118.27

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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.