Home / 28,356.14-39,129.80-16,418.64

Finding the Fourth Proportional to 28,356.14, 39,129.80 and 16,418.64

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Solution

The fourth proportional to 28,356.14, 39,129.80 and 16,418.64 is: 22,656.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,356.14 : 39,129.80 = 16,418.64 : x
  2. Step 2: Convert to fraction form
    28,356.14/39,129.80 = 16,418.64/x
  3. Step 3: Cross multiply
    28,356.14x = 39,129.80 × 16,418.64
  4. Step 4: Simplify right side
    28,356.14x = 642,458,099.47
  5. Step 5: Solve for x
    x = 642,458,099.47/28,356.14
  6. Step 6: Final answer
    x = 22,656.75

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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.