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Finding the Fourth Proportional to 7,485.12, 10,328.04 and 4,689

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Solution

The fourth proportional to 7,485.12, 10,328.04 and 4,689 is: 6,469.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,485.12 : 10,328.04 = 4,689 : x
  2. Step 2: Convert to fraction form
    7,485.12/10,328.04 = 4,689/x
  3. Step 3: Cross multiply
    7,485.12x = 10,328.04 × 4,689
  4. Step 4: Simplify right side
    7,485.12x = 48,428,179.56
  5. Step 5: Solve for x
    x = 48,428,179.56/7,485.12
  6. Step 6: Final answer
    x = 6,469.93

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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.