Home / 30,650.31-42,269.18-19,316.79

Finding the Fourth Proportional to 30,650.31, 42,269.18 and 19,316.79

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Solution

The fourth proportional to 30,650.31, 42,269.18 and 19,316.79 is: 26,639.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,650.31 : 42,269.18 = 19,316.79 : x
  2. Step 2: Convert to fraction form
    30,650.31/42,269.18 = 19,316.79/x
  3. Step 3: Cross multiply
    30,650.31x = 42,269.18 × 19,316.79
  4. Step 4: Simplify right side
    30,650.31x = 816,504,776.95
  5. Step 5: Solve for x
    x = 816,504,776.95/30,650.31
  6. Step 6: Final answer
    x = 26,639.36

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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.