Home / 13,079.40-19,619.10-12,860.70

Finding the Fourth Proportional to 13,079.40, 19,619.10 and 12,860.70

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Solution

The fourth proportional to 13,079.40, 19,619.10 and 12,860.70 is: 19,291.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,079.40 : 19,619.10 = 12,860.70 : x
  2. Step 2: Convert to fraction form
    13,079.40/19,619.10 = 12,860.70/x
  3. Step 3: Cross multiply
    13,079.40x = 19,619.10 × 12,860.70
  4. Step 4: Simplify right side
    13,079.40x = 252,315,359.37
  5. Step 5: Solve for x
    x = 252,315,359.37/13,079.40
  6. Step 6: Final answer
    x = 19,291.05

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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.