Home / 11,135.99-15,368.96-6,420.44

Finding the Fourth Proportional to 11,135.99, 15,368.96 and 6,420.44

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Solution

The fourth proportional to 11,135.99, 15,368.96 and 6,420.44 is: 8,860.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,135.99 : 15,368.96 = 6,420.44 : x
  2. Step 2: Convert to fraction form
    11,135.99/15,368.96 = 6,420.44/x
  3. Step 3: Cross multiply
    11,135.99x = 15,368.96 × 6,420.44
  4. Step 4: Simplify right side
    11,135.99x = 98,675,485.54
  5. Step 5: Solve for x
    x = 98,675,485.54/11,135.99
  6. Step 6: Final answer
    x = 8,860.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.