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Finding the Fourth Proportional to 9,240.40, 13,861.20 and 4,866.40

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Solution

The fourth proportional to 9,240.40, 13,861.20 and 4,866.40 is: 7,299.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,240.40 : 13,861.20 = 4,866.40 : x
  2. Step 2: Convert to fraction form
    9,240.40/13,861.20 = 4,866.40/x
  3. Step 3: Cross multiply
    9,240.40x = 13,861.20 × 4,866.40
  4. Step 4: Simplify right side
    9,240.40x = 67,454,143.68
  5. Step 5: Solve for x
    x = 67,454,143.68/9,240.40
  6. Step 6: Final answer
    x = 7,299.92

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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.