Home / 15,005.08-20,706.46-8,290.57

Finding the Fourth Proportional to 15,005.08, 20,706.46 and 8,290.57

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Solution

The fourth proportional to 15,005.08, 20,706.46 and 8,290.57 is: 11,440.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,005.08 : 20,706.46 = 8,290.57 : x
  2. Step 2: Convert to fraction form
    15,005.08/20,706.46 = 8,290.57/x
  3. Step 3: Cross multiply
    15,005.08x = 20,706.46 × 8,290.57
  4. Step 4: Simplify right side
    15,005.08x = 171,668,268.07
  5. Step 5: Solve for x
    x = 171,668,268.07/15,005.08
  6. Step 6: Final answer
    x = 11,440.67

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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.