Home / 13,228.13-18,255.35-7,639.13

Finding the Fourth Proportional to 13,228.13, 18,255.35 and 7,639.13

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Solution

The fourth proportional to 13,228.13, 18,255.35 and 7,639.13 is: 10,542.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,228.13 : 18,255.35 = 7,639.13 : x
  2. Step 2: Convert to fraction form
    13,228.13/18,255.35 = 7,639.13/x
  3. Step 3: Cross multiply
    13,228.13x = 18,255.35 × 7,639.13
  4. Step 4: Simplify right side
    13,228.13x = 139,454,919.67
  5. Step 5: Solve for x
    x = 139,454,919.67/13,228.13
  6. Step 6: Final answer
    x = 10,542.30

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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.