Home / 13,391.80-18,474.84-9,415.48

Finding the Fourth Proportional to 13,391.80, 18,474.84 and 9,415.48

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Solution

The fourth proportional to 13,391.80, 18,474.84 and 9,415.48 is: 12,989.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,391.80 : 18,474.84 = 9,415.48 : x
  2. Step 2: Convert to fraction form
    13,391.80/18,474.84 = 9,415.48/x
  3. Step 3: Cross multiply
    13,391.80x = 18,474.84 × 9,415.48
  4. Step 4: Simplify right side
    13,391.80x = 173,949,486.52
  5. Step 5: Solve for x
    x = 173,949,486.52/13,391.80
  6. Step 6: Final answer
    x = 12,989.25

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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.