Home / 13,228.75-18,255.36-7,260.40

Finding the Fourth Proportional to 13,228.75, 18,255.36 and 7,260.40

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Solution

The fourth proportional to 13,228.75, 18,255.36 and 7,260.40 is: 10,019.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,228.75 : 18,255.36 = 7,260.40 : x
  2. Step 2: Convert to fraction form
    13,228.75/18,255.36 = 7,260.40/x
  3. Step 3: Cross multiply
    13,228.75x = 18,255.36 × 7,260.40
  4. Step 4: Simplify right side
    13,228.75x = 132,541,215.74
  5. Step 5: Solve for x
    x = 132,541,215.74/13,228.75
  6. Step 6: Final answer
    x = 10,019.18

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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.