Home / 28,212.36-42,319.41-8,491.06

Finding the Fourth Proportional to 28,212.36, 42,319.41 and 8,491.06

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Solution

The fourth proportional to 28,212.36, 42,319.41 and 8,491.06 is: 12,736.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,212.36 : 42,319.41 = 8,491.06 : x
  2. Step 2: Convert to fraction form
    28,212.36/42,319.41 = 8,491.06/x
  3. Step 3: Cross multiply
    28,212.36x = 42,319.41 × 8,491.06
  4. Step 4: Simplify right side
    28,212.36x = 359,336,649.47
  5. Step 5: Solve for x
    x = 359,336,649.47/28,212.36
  6. Step 6: Final answer
    x = 12,736.85

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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.