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Finding the Fourth Proportional to 6,486.13, 8,955.15 and 4,991.41

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Solution

The fourth proportional to 6,486.13, 8,955.15 and 4,991.41 is: 6,891.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,486.13 : 8,955.15 = 4,991.41 : x
  2. Step 2: Convert to fraction form
    6,486.13/8,955.15 = 4,991.41/x
  3. Step 3: Cross multiply
    6,486.13x = 8,955.15 × 4,991.41
  4. Step 4: Simplify right side
    6,486.13x = 44,698,825.26
  5. Step 5: Solve for x
    x = 44,698,825.26/6,486.13
  6. Step 6: Final answer
    x = 6,891.45

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Double scale
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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.