Home / 28,430.76-42,650.42-9,190.09

Finding the Fourth Proportional to 28,430.76, 42,650.42 and 9,190.09

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Solution

The fourth proportional to 28,430.76, 42,650.42 and 9,190.09 is: 13,786.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,430.76 : 42,650.42 = 9,190.09 : x
  2. Step 2: Convert to fraction form
    28,430.76/42,650.42 = 9,190.09/x
  3. Step 3: Cross multiply
    28,430.76x = 42,650.42 × 9,190.09
  4. Step 4: Simplify right side
    28,430.76x = 391,961,205.70
  5. Step 5: Solve for x
    x = 391,961,205.70/28,430.76
  6. Step 6: Final answer
    x = 13,786.52

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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.