Home / 12,878.12-19,320.84-4,113.72

Finding the Fourth Proportional to 12,878.12, 19,320.84 and 4,113.72

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Solution

The fourth proportional to 12,878.12, 19,320.84 and 4,113.72 is: 6,171.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,878.12 : 19,320.84 = 4,113.72 : x
  2. Step 2: Convert to fraction form
    12,878.12/19,320.84 = 4,113.72/x
  3. Step 3: Cross multiply
    12,878.12x = 19,320.84 × 4,113.72
  4. Step 4: Simplify right side
    12,878.12x = 79,480,525.92
  5. Step 5: Solve for x
    x = 79,480,525.92/12,878.12
  6. Step 6: Final answer
    x = 6,171.75

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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.