Home / 28,143.66-42,222.60-8,422.14

Finding the Fourth Proportional to 28,143.66, 42,222.60 and 8,422.14

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Solution

The fourth proportional to 28,143.66, 42,222.60 and 8,422.14 is: 12,635.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,143.66 : 42,222.60 = 8,422.14 : x
  2. Step 2: Convert to fraction form
    28,143.66/42,222.60 = 8,422.14/x
  3. Step 3: Cross multiply
    28,143.66x = 42,222.60 × 8,422.14
  4. Step 4: Simplify right side
    28,143.66x = 355,604,648.36
  5. Step 5: Solve for x
    x = 355,604,648.36/28,143.66
  6. Step 6: Final answer
    x = 12,635.34

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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.