Home / 12,657.13-18,986.20-4,758.85

Finding the Fourth Proportional to 12,657.13, 18,986.20 and 4,758.85

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Solution

The fourth proportional to 12,657.13, 18,986.20 and 4,758.85 is: 7,138.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,657.13 : 18,986.20 = 4,758.85 : x
  2. Step 2: Convert to fraction form
    12,657.13/18,986.20 = 4,758.85/x
  3. Step 3: Cross multiply
    12,657.13x = 18,986.20 × 4,758.85
  4. Step 4: Simplify right side
    12,657.13x = 90,352,477.87
  5. Step 5: Solve for x
    x = 90,352,477.87/12,657.13
  6. Step 6: Final answer
    x = 7,138.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.