Home / 28,149.21-42,220.85-9,427.28

Finding the Fourth Proportional to 28,149.21, 42,220.85 and 9,427.28

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Solution

The fourth proportional to 28,149.21, 42,220.85 and 9,427.28 is: 14,139.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,149.21 : 42,220.85 = 9,427.28 : x
  2. Step 2: Convert to fraction form
    28,149.21/42,220.85 = 9,427.28/x
  3. Step 3: Cross multiply
    28,149.21x = 42,220.85 × 9,427.28
  4. Step 4: Simplify right side
    28,149.21x = 398,027,516.55
  5. Step 5: Solve for x
    x = 398,027,516.55/28,149.21
  6. Step 6: Final answer
    x = 14,139.92

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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.