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Finding the Fourth Proportional to 11,334.40, 15,642.08 and 6,621.44

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Solution

The fourth proportional to 11,334.40, 15,642.08 and 6,621.44 is: 9,137.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,334.40 : 15,642.08 = 6,621.44 : x
  2. Step 2: Convert to fraction form
    11,334.40/15,642.08 = 6,621.44/x
  3. Step 3: Cross multiply
    11,334.40x = 15,642.08 × 6,621.44
  4. Step 4: Simplify right side
    11,334.40x = 103,573,094.20
  5. Step 5: Solve for x
    x = 103,573,094.20/11,334.40
  6. Step 6: Final answer
    x = 9,137.94

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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.