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Finding the Fourth Proportional to 13,698.80, 19,217.20 and 13,698.80

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Solution

The fourth proportional to 13,698.80, 19,217.20 and 13,698.80 is: 19,217.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,698.80 : 19,217.20 = 13,698.80 : x
  2. Step 2: Convert to fraction form
    13,698.80/19,217.20 = 13,698.80/x
  3. Step 3: Cross multiply
    13,698.80x = 19,217.20 × 13,698.80
  4. Step 4: Simplify right side
    13,698.80x = 263,252,579.36
  5. Step 5: Solve for x
    x = 263,252,579.36/13,698.80
  6. Step 6: Final answer
    x = 19,217.20

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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.