Home / 11,555.20-17,328.40-9,118.72

Finding the Fourth Proportional to 11,555.20, 17,328.40 and 9,118.72

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Solution

The fourth proportional to 11,555.20, 17,328.40 and 9,118.72 is: 13,674.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,555.20 : 17,328.40 = 9,118.72 : x
  2. Step 2: Convert to fraction form
    11,555.20/17,328.40 = 9,118.72/x
  3. Step 3: Cross multiply
    11,555.20x = 17,328.40 × 9,118.72
  4. Step 4: Simplify right side
    11,555.20x = 158,012,827.65
  5. Step 5: Solve for x
    x = 158,012,827.65/11,555.20
  6. Step 6: Final answer
    x = 13,674.61

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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.