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Finding the Fourth Proportional to 6,629.60, 9,139.02 and 4,858.40

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Solution

The fourth proportional to 6,629.60, 9,139.02 and 4,858.40 is: 6,697.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,629.60 : 9,139.02 = 4,858.40 : x
  2. Step 2: Convert to fraction form
    6,629.60/9,139.02 = 4,858.40/x
  3. Step 3: Cross multiply
    6,629.60x = 9,139.02 × 4,858.40
  4. Step 4: Simplify right side
    6,629.60x = 44,401,014.77
  5. Step 5: Solve for x
    x = 44,401,014.77/6,629.60
  6. Step 6: Final answer
    x = 6,697.39

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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.