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Finding the Fourth Proportional to 6,600.79, 9,899.10 and 2,157.45

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Solution

The fourth proportional to 6,600.79, 9,899.10 and 2,157.45 is: 3,235.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,600.79 : 9,899.10 = 2,157.45 : x
  2. Step 2: Convert to fraction form
    6,600.79/9,899.10 = 2,157.45/x
  3. Step 3: Cross multiply
    6,600.79x = 9,899.10 × 2,157.45
  4. Step 4: Simplify right side
    6,600.79x = 21,356,845.02
  5. Step 5: Solve for x
    x = 21,356,845.02/6,600.79
  6. Step 6: Final answer
    x = 3,235.50

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Half scale
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Double scale
Find fourth proportional to 6,601.79, 9,900.60 and 2,158.45
Similar ratio
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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.