Home / 13,427.76-18,531.48-7,840.56

Finding the Fourth Proportional to 13,427.76, 18,531.48 and 7,840.56

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Solution

The fourth proportional to 13,427.76, 18,531.48 and 7,840.56 is: 10,820.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,427.76 : 18,531.48 = 7,840.56 : x
  2. Step 2: Convert to fraction form
    13,427.76/18,531.48 = 7,840.56/x
  3. Step 3: Cross multiply
    13,427.76x = 18,531.48 × 7,840.56
  4. Step 4: Simplify right side
    13,427.76x = 145,297,180.83
  5. Step 5: Solve for x
    x = 145,297,180.83/13,427.76
  6. Step 6: Final answer
    x = 10,820.66

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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.