Home / 30,971.72-42,747.76-20,362.34

Finding the Fourth Proportional to 30,971.72, 42,747.76 and 20,362.34

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Solution

The fourth proportional to 30,971.72, 42,747.76 and 20,362.34 is: 28,104.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,971.72 : 42,747.76 = 20,362.34 : x
  2. Step 2: Convert to fraction form
    30,971.72/42,747.76 = 20,362.34/x
  3. Step 3: Cross multiply
    30,971.72x = 42,747.76 × 20,362.34
  4. Step 4: Simplify right side
    30,971.72x = 870,444,555.68
  5. Step 5: Solve for x
    x = 870,444,555.68/30,971.72
  6. Step 6: Final answer
    x = 28,104.49

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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.