Home / 30,128.70-45,195.36-10,138.29

Finding the Fourth Proportional to 30,128.70, 45,195.36 and 10,138.29

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Solution

The fourth proportional to 30,128.70, 45,195.36 and 10,138.29 is: 15,208.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,128.70 : 45,195.36 = 10,138.29 : x
  2. Step 2: Convert to fraction form
    30,128.70/45,195.36 = 10,138.29/x
  3. Step 3: Cross multiply
    30,128.70x = 45,195.36 × 10,138.29
  4. Step 4: Simplify right side
    30,128.70x = 458,203,666.33
  5. Step 5: Solve for x
    x = 458,203,666.33/30,128.70
  6. Step 6: Final answer
    x = 15,208.21

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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.