Home / 13,555.19-18,706.88-8,517.55

Finding the Fourth Proportional to 13,555.19, 18,706.88 and 8,517.55

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Solution

The fourth proportional to 13,555.19, 18,706.88 and 8,517.55 is: 11,754.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,555.19 : 18,706.88 = 8,517.55 : x
  2. Step 2: Convert to fraction form
    13,555.19/18,706.88 = 8,517.55/x
  3. Step 3: Cross multiply
    13,555.19x = 18,706.88 × 8,517.55
  4. Step 4: Simplify right side
    13,555.19x = 159,336,785.74
  5. Step 5: Solve for x
    x = 159,336,785.74/13,555.19
  6. Step 6: Final answer
    x = 11,754.67

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Half scale
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Double scale
Find fourth proportional to 13,556.19, 18,708.26 and 8,518.55
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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.