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Finding the Fourth Proportional to 15,130.56, 20,880.18 and 8,506.56

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Solution

The fourth proportional to 15,130.56, 20,880.18 and 8,506.56 is: 11,739.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,130.56 : 20,880.18 = 8,506.56 : x
  2. Step 2: Convert to fraction form
    15,130.56/20,880.18 = 8,506.56/x
  3. Step 3: Cross multiply
    15,130.56x = 20,880.18 × 8,506.56
  4. Step 4: Simplify right side
    15,130.56x = 177,618,524.28
  5. Step 5: Solve for x
    x = 177,618,524.28/15,130.56
  6. Step 6: Final answer
    x = 11,739.06

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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.