Home / 30,930.92-42,670.50-18,351.08

Finding the Fourth Proportional to 30,930.92, 42,670.50 and 18,351.08

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Solution

The fourth proportional to 30,930.92, 42,670.50 and 18,351.08 is: 25,316.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,930.92 : 42,670.50 = 18,351.08 : x
  2. Step 2: Convert to fraction form
    30,930.92/42,670.50 = 18,351.08/x
  3. Step 3: Cross multiply
    30,930.92x = 42,670.50 × 18,351.08
  4. Step 4: Simplify right side
    30,930.92x = 783,049,759.14
  5. Step 5: Solve for x
    x = 783,049,759.14/30,930.92
  6. Step 6: Final answer
    x = 25,316.08

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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.