Home / 13,135.22-18,126.60-8,419.51

Finding the Fourth Proportional to 13,135.22, 18,126.60 and 8,419.51

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Solution

The fourth proportional to 13,135.22, 18,126.60 and 8,419.51 is: 11,618.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,135.22 : 18,126.60 = 8,419.51 : x
  2. Step 2: Convert to fraction form
    13,135.22/18,126.60 = 8,419.51/x
  3. Step 3: Cross multiply
    13,135.22x = 18,126.60 × 8,419.51
  4. Step 4: Simplify right side
    13,135.22x = 152,617,144.20
  5. Step 5: Solve for x
    x = 152,617,144.20/13,135.22
  6. Step 6: Final answer
    x = 11,618.93

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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.