Home / 8,416.89-11,615.39-4,640.19

Finding the Fourth Proportional to 8,416.89, 11,615.39 and 4,640.19

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Solution

The fourth proportional to 8,416.89, 11,615.39 and 4,640.19 is: 6,403.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,416.89 : 11,615.39 = 4,640.19 : x
  2. Step 2: Convert to fraction form
    8,416.89/11,615.39 = 4,640.19/x
  3. Step 3: Cross multiply
    8,416.89x = 11,615.39 × 4,640.19
  4. Step 4: Simplify right side
    8,416.89x = 53,897,610.72
  5. Step 5: Solve for x
    x = 53,897,610.72/8,416.89
  6. Step 6: Final answer
    x = 6,403.51

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Half scale
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Double scale
Find fourth proportional to 8,417.89, 11,616.77 and 4,641.19
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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.