Home / 10,085.15-15,128.44-2,689.57

Finding the Fourth Proportional to 10,085.15, 15,128.44 and 2,689.57

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Solution

The fourth proportional to 10,085.15, 15,128.44 and 2,689.57 is: 4,034.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,085.15 : 15,128.44 = 2,689.57 : x
  2. Step 2: Convert to fraction form
    10,085.15/15,128.44 = 2,689.57/x
  3. Step 3: Cross multiply
    10,085.15x = 15,128.44 × 2,689.57
  4. Step 4: Simplify right side
    10,085.15x = 40,688,922.73
  5. Step 5: Solve for x
    x = 40,688,922.73/10,085.15
  6. Step 6: Final answer
    x = 4,034.54

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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.