Home / 30,628.30-42,270.96-18,689.10

Finding the Fourth Proportional to 30,628.30, 42,270.96 and 18,689.10

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Solution

The fourth proportional to 30,628.30, 42,270.96 and 18,689.10 is: 25,793.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,628.30 : 42,270.96 = 18,689.10 : x
  2. Step 2: Convert to fraction form
    30,628.30/42,270.96 = 18,689.10/x
  3. Step 3: Cross multiply
    30,628.30x = 42,270.96 × 18,689.10
  4. Step 4: Simplify right side
    30,628.30x = 790,006,198.54
  5. Step 5: Solve for x
    x = 790,006,198.54/30,628.30
  6. Step 6: Final answer
    x = 25,793.34

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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.