Home / 28,139.63-42,188.45-9,408.57

Finding the Fourth Proportional to 28,139.63, 42,188.45 and 9,408.57

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Solution

The fourth proportional to 28,139.63, 42,188.45 and 9,408.57 is: 14,105.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,139.63 : 42,188.45 = 9,408.57 : x
  2. Step 2: Convert to fraction form
    28,139.63/42,188.45 = 9,408.57/x
  3. Step 3: Cross multiply
    28,139.63x = 42,188.45 × 9,408.57
  4. Step 4: Simplify right side
    28,139.63x = 396,932,937.97
  5. Step 5: Solve for x
    x = 396,932,937.97/28,139.63
  6. Step 6: Final answer
    x = 14,105.84

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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.