Home / 13,588.80-18,745.56-9,112.56

Finding the Fourth Proportional to 13,588.80, 18,745.56 and 9,112.56

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Solution

The fourth proportional to 13,588.80, 18,745.56 and 9,112.56 is: 12,570.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,588.80 : 18,745.56 = 9,112.56 : x
  2. Step 2: Convert to fraction form
    13,588.80/18,745.56 = 9,112.56/x
  3. Step 3: Cross multiply
    13,588.80x = 18,745.56 × 9,112.56
  4. Step 4: Simplify right side
    13,588.80x = 170,820,040.23
  5. Step 5: Solve for x
    x = 170,820,040.23/13,588.80
  6. Step 6: Final answer
    x = 12,570.65

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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.