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Finding the Fourth Proportional to 15,130.50, 20,880.09 and 8,506.50

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Solution

The fourth proportional to 15,130.50, 20,880.09 and 8,506.50 is: 11,738.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,130.50 : 20,880.09 = 8,506.50 : x
  2. Step 2: Convert to fraction form
    15,130.50/20,880.09 = 8,506.50/x
  3. Step 3: Cross multiply
    15,130.50x = 20,880.09 × 8,506.50
  4. Step 4: Simplify right side
    15,130.50x = 177,616,485.59
  5. Step 5: Solve for x
    x = 177,616,485.59/15,130.50
  6. Step 6: Final answer
    x = 11,738.97

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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.