Home / 30,155.70-45,215.31-13,512.66

Finding the Fourth Proportional to 30,155.70, 45,215.31 and 13,512.66

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Solution

The fourth proportional to 30,155.70, 45,215.31 and 13,512.66 is: 20,260.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,155.70 : 45,215.31 = 13,512.66 : x
  2. Step 2: Convert to fraction form
    30,155.70/45,215.31 = 13,512.66/x
  3. Step 3: Cross multiply
    30,155.70x = 45,215.31 × 13,512.66
  4. Step 4: Simplify right side
    30,155.70x = 610,979,110.82
  5. Step 5: Solve for x
    x = 610,979,110.82/30,155.70
  6. Step 6: Final answer
    x = 20,260.82

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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.