Home / 6,520.79-8,988.74-3,998.22

Finding the Fourth Proportional to 6,520.79, 8,988.74 and 3,998.22

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Solution

The fourth proportional to 6,520.79, 8,988.74 and 3,998.22 is: 5,511.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,520.79 : 8,988.74 = 3,998.22 : x
  2. Step 2: Convert to fraction form
    6,520.79/8,988.74 = 3,998.22/x
  3. Step 3: Cross multiply
    6,520.79x = 8,988.74 × 3,998.22
  4. Step 4: Simplify right side
    6,520.79x = 35,938,992.97
  5. Step 5: Solve for x
    x = 35,938,992.97/6,520.79
  6. Step 6: Final answer
    x = 5,511.45

Related Problems

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Half scale
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Double scale
Find fourth proportional to 6,521.79, 8,990.12 and 3,999.22
Similar ratio
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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.