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Finding the Fourth Proportional to 6,300.40, 9,450.60 and 4,221.40

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Solution

The fourth proportional to 6,300.40, 9,450.60 and 4,221.40 is: 6,332.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,300.40 : 9,450.60 = 4,221.40 : x
  2. Step 2: Convert to fraction form
    6,300.40/9,450.60 = 4,221.40/x
  3. Step 3: Cross multiply
    6,300.40x = 9,450.60 × 4,221.40
  4. Step 4: Simplify right side
    6,300.40x = 39,894,762.84
  5. Step 5: Solve for x
    x = 39,894,762.84/6,300.40
  6. Step 6: Final answer
    x = 6,332.10

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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.