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Finding the Fourth Proportional to 13,621.90, 18,797.07 and 7,653.10

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Solution

The fourth proportional to 13,621.90, 18,797.07 and 7,653.10 is: 10,560.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,621.90 : 18,797.07 = 7,653.10 : x
  2. Step 2: Convert to fraction form
    13,621.90/18,797.07 = 7,653.10/x
  3. Step 3: Cross multiply
    13,621.90x = 18,797.07 × 7,653.10
  4. Step 4: Simplify right side
    13,621.90x = 143,855,856.42
  5. Step 5: Solve for x
    x = 143,855,856.42/13,621.90
  6. Step 6: Final answer
    x = 10,560.63

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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.