Home / 13,430.37-18,536.13-11,188.70

Finding the Fourth Proportional to 13,430.37, 18,536.13 and 11,188.70

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Solution

The fourth proportional to 13,430.37, 18,536.13 and 11,188.70 is: 15,442.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,430.37 : 18,536.13 = 11,188.70 : x
  2. Step 2: Convert to fraction form
    13,430.37/18,536.13 = 11,188.70/x
  3. Step 3: Cross multiply
    13,430.37x = 18,536.13 × 11,188.70
  4. Step 4: Simplify right side
    13,430.37x = 207,395,197.73
  5. Step 5: Solve for x
    x = 207,395,197.73/13,430.37
  6. Step 6: Final answer
    x = 15,442.25

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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.