Home / 13,215-18,236.70-7,629.24

Finding the Fourth Proportional to 13,215, 18,236.70 and 7,629.24

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Solution

The fourth proportional to 13,215, 18,236.70 and 7,629.24 is: 10,528.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215 : 18,236.70 = 7,629.24 : x
  2. Step 2: Convert to fraction form
    13,215/18,236.70 = 7,629.24/x
  3. Step 3: Cross multiply
    13,215x = 18,236.70 × 7,629.24
  4. Step 4: Simplify right side
    13,215x = 139,132,161.11
  5. Step 5: Solve for x
    x = 139,132,161.11/13,215
  6. Step 6: Final answer
    x = 10,528.35

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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.