Home / 30,120.36-45,174.96-12,585.48

Finding the Fourth Proportional to 30,120.36, 45,174.96 and 12,585.48

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Solution

The fourth proportional to 30,120.36, 45,174.96 and 12,585.48 is: 18,875.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,120.36 : 45,174.96 = 12,585.48 : x
  2. Step 2: Convert to fraction form
    30,120.36/45,174.96 = 12,585.48/x
  3. Step 3: Cross multiply
    30,120.36x = 45,174.96 × 12,585.48
  4. Step 4: Simplify right side
    30,120.36x = 568,548,555.58
  5. Step 5: Solve for x
    x = 568,548,555.58/30,120.36
  6. Step 6: Final answer
    x = 18,875.89

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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.