Home / 15,085.19-20,817.35-8,370.79

Finding the Fourth Proportional to 15,085.19, 20,817.35 and 8,370.79

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Solution

The fourth proportional to 15,085.19, 20,817.35 and 8,370.79 is: 11,551.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,085.19 : 20,817.35 = 8,370.79 : x
  2. Step 2: Convert to fraction form
    15,085.19/20,817.35 = 8,370.79/x
  3. Step 3: Cross multiply
    15,085.19x = 20,817.35 × 8,370.79
  4. Step 4: Simplify right side
    15,085.19x = 174,257,766.88
  5. Step 5: Solve for x
    x = 174,257,766.88/15,085.19
  6. Step 6: Final answer
    x = 11,551.58

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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.