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Finding the Fourth Proportional to 13,395.70, 18,488.73 and 7,734.16

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Solution

The fourth proportional to 13,395.70, 18,488.73 and 7,734.16 is: 10,674.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,395.70 : 18,488.73 = 7,734.16 : x
  2. Step 2: Convert to fraction form
    13,395.70/18,488.73 = 7,734.16/x
  3. Step 3: Cross multiply
    13,395.70x = 18,488.73 × 7,734.16
  4. Step 4: Simplify right side
    13,395.70x = 142,994,796.02
  5. Step 5: Solve for x
    x = 142,994,796.02/13,395.70
  6. Step 6: Final answer
    x = 10,674.68

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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.