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Finding the Fourth Proportional to 13,328.25, 18,394.61 and 7,739.25

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Solution

The fourth proportional to 13,328.25, 18,394.61 and 7,739.25 is: 10,681.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,328.25 : 18,394.61 = 7,739.25 : x
  2. Step 2: Convert to fraction form
    13,328.25/18,394.61 = 7,739.25/x
  3. Step 3: Cross multiply
    13,328.25x = 18,394.61 × 7,739.25
  4. Step 4: Simplify right side
    13,328.25x = 142,360,485.44
  5. Step 5: Solve for x
    x = 142,360,485.44/13,328.25
  6. Step 6: Final answer
    x = 10,681.11

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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.