Home / 13,758.20-18,986.41-7,470.58

Finding the Fourth Proportional to 13,758.20, 18,986.41 and 7,470.58

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Solution

The fourth proportional to 13,758.20, 18,986.41 and 7,470.58 is: 10,309.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,758.20 : 18,986.41 = 7,470.58 : x
  2. Step 2: Convert to fraction form
    13,758.20/18,986.41 = 7,470.58/x
  3. Step 3: Cross multiply
    13,758.20x = 18,986.41 × 7,470.58
  4. Step 4: Simplify right side
    13,758.20x = 141,839,494.82
  5. Step 5: Solve for x
    x = 141,839,494.82/13,758.20
  6. Step 6: Final answer
    x = 10,309.45

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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.