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Finding the Fourth Proportional to 6,417.60, 8,854.74 and 3,728.40

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Solution

The fourth proportional to 6,417.60, 8,854.74 and 3,728.40 is: 5,144.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,417.60 : 8,854.74 = 3,728.40 : x
  2. Step 2: Convert to fraction form
    6,417.60/8,854.74 = 3,728.40/x
  3. Step 3: Cross multiply
    6,417.60x = 8,854.74 × 3,728.40
  4. Step 4: Simplify right side
    6,417.60x = 33,014,012.62
  5. Step 5: Solve for x
    x = 33,014,012.62/6,417.60
  6. Step 6: Final answer
    x = 5,144.29

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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.