Home / 15,395.37-21,243.81-8,680.60

Finding the Fourth Proportional to 15,395.37, 21,243.81 and 8,680.60

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Solution

The fourth proportional to 15,395.37, 21,243.81 and 8,680.60 is: 11,978.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,395.37 : 21,243.81 = 8,680.60 : x
  2. Step 2: Convert to fraction form
    15,395.37/21,243.81 = 8,680.60/x
  3. Step 3: Cross multiply
    15,395.37x = 21,243.81 × 8,680.60
  4. Step 4: Simplify right side
    15,395.37x = 184,408,894.02
  5. Step 5: Solve for x
    x = 184,408,894.02/15,395.37
  6. Step 6: Final answer
    x = 11,978.20

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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.