Home / 13,680.40-18,876.60-7,629.28

Finding the Fourth Proportional to 13,680.40, 18,876.60 and 7,629.28

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Solution

The fourth proportional to 13,680.40, 18,876.60 and 7,629.28 is: 10,527.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,680.40 : 18,876.60 = 7,629.28 : x
  2. Step 2: Convert to fraction form
    13,680.40/18,876.60 = 7,629.28/x
  3. Step 3: Cross multiply
    13,680.40x = 18,876.60 × 7,629.28
  4. Step 4: Simplify right side
    13,680.40x = 144,014,866.85
  5. Step 5: Solve for x
    x = 144,014,866.85/13,680.40
  6. Step 6: Final answer
    x = 10,527.09

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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.