Home / 13,131.60-18,128.32-8,905.02

Finding the Fourth Proportional to 13,131.60, 18,128.32 and 8,905.02

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Solution

The fourth proportional to 13,131.60, 18,128.32 and 8,905.02 is: 12,293.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,131.60 : 18,128.32 = 8,905.02 : x
  2. Step 2: Convert to fraction form
    13,131.60/18,128.32 = 8,905.02/x
  3. Step 3: Cross multiply
    13,131.60x = 18,128.32 × 8,905.02
  4. Step 4: Simplify right side
    13,131.60x = 161,433,052.17
  5. Step 5: Solve for x
    x = 161,433,052.17/13,131.60
  6. Step 6: Final answer
    x = 12,293.48

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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.