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Finding the Fourth Proportional to 14,441.58, 19,928.42 and 8,391.28

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Solution

The fourth proportional to 14,441.58, 19,928.42 and 8,391.28 is: 11,579.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,441.58 : 19,928.42 = 8,391.28 : x
  2. Step 2: Convert to fraction form
    14,441.58/19,928.42 = 8,391.28/x
  3. Step 3: Cross multiply
    14,441.58x = 19,928.42 × 8,391.28
  4. Step 4: Simplify right side
    14,441.58x = 167,224,973.16
  5. Step 5: Solve for x
    x = 167,224,973.16/14,441.58
  6. Step 6: Final answer
    x = 11,579.41

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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.