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Finding the Fourth Proportional to 13,216.50, 18,239.49 and 7,629.30

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Solution

The fourth proportional to 13,216.50, 18,239.49 and 7,629.30 is: 10,528.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,216.50 : 18,239.49 = 7,629.30 : x
  2. Step 2: Convert to fraction form
    13,216.50/18,239.49 = 7,629.30/x
  3. Step 3: Cross multiply
    13,216.50x = 18,239.49 × 7,629.30
  4. Step 4: Simplify right side
    13,216.50x = 139,154,541.06
  5. Step 5: Solve for x
    x = 139,154,541.06/13,216.50
  6. Step 6: Final answer
    x = 10,528.85

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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.