Home / 13,758.21-18,986.40-7,470.57

Finding the Fourth Proportional to 13,758.21, 18,986.40 and 7,470.57

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Solution

The fourth proportional to 13,758.21, 18,986.40 and 7,470.57 is: 10,309.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,758.21 : 18,986.40 = 7,470.57 : x
  2. Step 2: Convert to fraction form
    13,758.21/18,986.40 = 7,470.57/x
  3. Step 3: Cross multiply
    13,758.21x = 18,986.40 × 7,470.57
  4. Step 4: Simplify right side
    13,758.21x = 141,839,230.25
  5. Step 5: Solve for x
    x = 141,839,230.25/13,758.21
  6. Step 6: Final answer
    x = 10,309.42

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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.