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Finding the Fourth Proportional to 13,683.70, 19,215.50 and 13,683.70

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Solution

The fourth proportional to 13,683.70, 19,215.50 and 13,683.70 is: 19,215.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,683.70 : 19,215.50 = 13,683.70 : x
  2. Step 2: Convert to fraction form
    13,683.70/19,215.50 = 13,683.70/x
  3. Step 3: Cross multiply
    13,683.70x = 19,215.50 × 13,683.70
  4. Step 4: Simplify right side
    13,683.70x = 262,939,137.35
  5. Step 5: Solve for x
    x = 262,939,137.35/13,683.70
  6. Step 6: Final answer
    x = 19,215.50

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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.