Home / 20,640.74-28,483.44-11,686.46

Finding the Fourth Proportional to 20,640.74, 28,483.44 and 11,686.46

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Solution

The fourth proportional to 20,640.74, 28,483.44 and 11,686.46 is: 16,126.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.74 : 28,483.44 = 11,686.46 : x
  2. Step 2: Convert to fraction form
    20,640.74/28,483.44 = 11,686.46/x
  3. Step 3: Cross multiply
    20,640.74x = 28,483.44 × 11,686.46
  4. Step 4: Simplify right side
    20,640.74x = 332,870,582.22
  5. Step 5: Solve for x
    x = 332,870,582.22/20,640.74
  6. Step 6: Final answer
    x = 16,126.87

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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.