Home / 13,589.20-18,751.80-7,619.50

Finding the Fourth Proportional to 13,589.20, 18,751.80 and 7,619.50

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Solution

The fourth proportional to 13,589.20, 18,751.80 and 7,619.50 is: 10,514.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,589.20 : 18,751.80 = 7,619.50 : x
  2. Step 2: Convert to fraction form
    13,589.20/18,751.80 = 7,619.50/x
  3. Step 3: Cross multiply
    13,589.20x = 18,751.80 × 7,619.50
  4. Step 4: Simplify right side
    13,589.20x = 142,879,340.10
  5. Step 5: Solve for x
    x = 142,879,340.10/13,589.20
  6. Step 6: Final answer
    x = 10,514.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.