Home / 13,384.36-20,112.86-7,148.72

Finding the Fourth Proportional to 13,384.36, 20,112.86 and 7,148.72

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Solution

The fourth proportional to 13,384.36, 20,112.86 and 7,148.72 is: 10,742.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,384.36 : 20,112.86 = 7,148.72 : x
  2. Step 2: Convert to fraction form
    13,384.36/20,112.86 = 7,148.72/x
  3. Step 3: Cross multiply
    13,384.36x = 20,112.86 × 7,148.72
  4. Step 4: Simplify right side
    13,384.36x = 143,781,204.54
  5. Step 5: Solve for x
    x = 143,781,204.54/13,384.36
  6. Step 6: Final answer
    x = 10,742.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.