Home / 20,928.36-28,878.78-12,427.44

Finding the Fourth Proportional to 20,928.36, 28,878.78 and 12,427.44

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Solution

The fourth proportional to 20,928.36, 28,878.78 and 12,427.44 is: 17,148.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.36 : 28,878.78 = 12,427.44 : x
  2. Step 2: Convert to fraction form
    20,928.36/28,878.78 = 12,427.44/x
  3. Step 3: Cross multiply
    20,928.36x = 28,878.78 × 12,427.44
  4. Step 4: Simplify right side
    20,928.36x = 358,889,305.72
  5. Step 5: Solve for x
    x = 358,889,305.72/20,928.36
  6. Step 6: Final answer
    x = 17,148.47

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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.