Home / 10,868.64-16,300.80-5,319.60

Finding the Fourth Proportional to 10,868.64, 16,300.80 and 5,319.60

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Solution

The fourth proportional to 10,868.64, 16,300.80 and 5,319.60 is: 7,978.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,868.64 : 16,300.80 = 5,319.60 : x
  2. Step 2: Convert to fraction form
    10,868.64/16,300.80 = 5,319.60/x
  3. Step 3: Cross multiply
    10,868.64x = 16,300.80 × 5,319.60
  4. Step 4: Simplify right side
    10,868.64x = 86,713,735.68
  5. Step 5: Solve for x
    x = 86,713,735.68/10,868.64
  6. Step 6: Final answer
    x = 7,978.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.