Home / 13,144.80-18,140-7,176.40

Finding the Fourth Proportional to 13,144.80, 18,140 and 7,176.40

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Solution

The fourth proportional to 13,144.80, 18,140 and 7,176.40 is: 9,903.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,144.80 : 18,140 = 7,176.40 : x
  2. Step 2: Convert to fraction form
    13,144.80/18,140 = 7,176.40/x
  3. Step 3: Cross multiply
    13,144.80x = 18,140 × 7,176.40
  4. Step 4: Simplify right side
    13,144.80x = 130,179,896
  5. Step 5: Solve for x
    x = 130,179,896/13,144.80
  6. Step 6: Final answer
    x = 9,903.53

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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.