Home / 12,658.13-18,987.70-4,759.85

Finding the Fourth Proportional to 12,658.13, 18,987.70 and 4,759.85

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Solution

The fourth proportional to 12,658.13, 18,987.70 and 4,759.85 is: 7,139.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,658.13 : 18,987.70 = 4,759.85 : x
  2. Step 2: Convert to fraction form
    12,658.13/18,987.70 = 4,759.85/x
  3. Step 3: Cross multiply
    12,658.13x = 18,987.70 × 4,759.85
  4. Step 4: Simplify right side
    12,658.13x = 90,378,603.85
  5. Step 5: Solve for x
    x = 90,378,603.85/12,658.13
  6. Step 6: Final answer
    x = 7,139.96

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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.