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Finding the Fourth Proportional to 13,626.40, 18,803.28 and 7,657.60

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Solution

The fourth proportional to 13,626.40, 18,803.28 and 7,657.60 is: 10,566.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,626.40 : 18,803.28 = 7,657.60 : x
  2. Step 2: Convert to fraction form
    13,626.40/18,803.28 = 7,657.60/x
  3. Step 3: Cross multiply
    13,626.40x = 18,803.28 × 7,657.60
  4. Step 4: Simplify right side
    13,626.40x = 143,987,996.93
  5. Step 5: Solve for x
    x = 143,987,996.93/13,626.40
  6. Step 6: Final answer
    x = 10,566.84

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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.