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Finding the Fourth Proportional to 14,917.20, 20,845.20 and 14,917.20

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Solution

The fourth proportional to 14,917.20, 20,845.20 and 14,917.20 is: 20,845.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,917.20 : 20,845.20 = 14,917.20 : x
  2. Step 2: Convert to fraction form
    14,917.20/20,845.20 = 14,917.20/x
  3. Step 3: Cross multiply
    14,917.20x = 20,845.20 × 14,917.20
  4. Step 4: Simplify right side
    14,917.20x = 310,952,017.44
  5. Step 5: Solve for x
    x = 310,952,017.44/14,917.20
  6. Step 6: Final answer
    x = 20,845.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.