Home / 30,071.72-41,479.62-20,645.48

Finding the Fourth Proportional to 30,071.72, 41,479.62 and 20,645.48

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Solution

The fourth proportional to 30,071.72, 41,479.62 and 20,645.48 is: 28,477.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,071.72 : 41,479.62 = 20,645.48 : x
  2. Step 2: Convert to fraction form
    30,071.72/41,479.62 = 20,645.48/x
  3. Step 3: Cross multiply
    30,071.72x = 41,479.62 × 20,645.48
  4. Step 4: Simplify right side
    30,071.72x = 856,366,665.12
  5. Step 5: Solve for x
    x = 856,366,665.12/30,071.72
  6. Step 6: Final answer
    x = 28,477.48

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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.