Home / 12,579.13-18,870.72-4,259.65

Finding the Fourth Proportional to 12,579.13, 18,870.72 and 4,259.65

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Solution

The fourth proportional to 12,579.13, 18,870.72 and 4,259.65 is: 6,390.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,579.13 : 18,870.72 = 4,259.65 : x
  2. Step 2: Convert to fraction form
    12,579.13/18,870.72 = 4,259.65/x
  3. Step 3: Cross multiply
    12,579.13x = 18,870.72 × 4,259.65
  4. Step 4: Simplify right side
    12,579.13x = 80,382,662.45
  5. Step 5: Solve for x
    x = 80,382,662.45/12,579.13
  6. Step 6: Final answer
    x = 6,390.16

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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.