Home / 12,879.63-19,320.12-4,113.86

Finding the Fourth Proportional to 12,879.63, 19,320.12 and 4,113.86

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Solution

The fourth proportional to 12,879.63, 19,320.12 and 4,113.86 is: 6,171.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,879.63 : 19,320.12 = 4,113.86 : x
  2. Step 2: Convert to fraction form
    12,879.63/19,320.12 = 4,113.86/x
  3. Step 3: Cross multiply
    12,879.63x = 19,320.12 × 4,113.86
  4. Step 4: Simplify right side
    12,879.63x = 79,480,172.26
  5. Step 5: Solve for x
    x = 79,480,172.26/12,879.63
  6. Step 6: Final answer
    x = 6,171.00

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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.