Home / 11,138.64-15,365.88-9,369.60

Finding the Fourth Proportional to 11,138.64, 15,365.88 and 9,369.60

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Solution

The fourth proportional to 11,138.64, 15,365.88 and 9,369.60 is: 12,925.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,138.64 : 15,365.88 = 9,369.60 : x
  2. Step 2: Convert to fraction form
    11,138.64/15,365.88 = 9,369.60/x
  3. Step 3: Cross multiply
    11,138.64x = 15,365.88 × 9,369.60
  4. Step 4: Simplify right side
    11,138.64x = 143,972,149.25
  5. Step 5: Solve for x
    x = 143,972,149.25/11,138.64
  6. Step 6: Final answer
    x = 12,925.47

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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.