Home / 13,101.52-18,080.75-7,725.55

Finding the Fourth Proportional to 13,101.52, 18,080.75 and 7,725.55

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Solution

The fourth proportional to 13,101.52, 18,080.75 and 7,725.55 is: 10,661.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,101.52 : 18,080.75 = 7,725.55 : x
  2. Step 2: Convert to fraction form
    13,101.52/18,080.75 = 7,725.55/x
  3. Step 3: Cross multiply
    13,101.52x = 18,080.75 × 7,725.55
  4. Step 4: Simplify right side
    13,101.52x = 139,683,738.16
  5. Step 5: Solve for x
    x = 139,683,738.16/13,101.52
  6. Step 6: Final answer
    x = 10,661.64

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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.