Home / 20,426.31-30,639.50-6,386.42

Finding the Fourth Proportional to 20,426.31, 30,639.50 and 6,386.42

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Solution

The fourth proportional to 20,426.31, 30,639.50 and 6,386.42 is: 9,579.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,426.31 : 30,639.50 = 6,386.42 : x
  2. Step 2: Convert to fraction form
    20,426.31/30,639.50 = 6,386.42/x
  3. Step 3: Cross multiply
    20,426.31x = 30,639.50 × 6,386.42
  4. Step 4: Simplify right side
    20,426.31x = 195,676,553.60
  5. Step 5: Solve for x
    x = 195,676,553.60/20,426.31
  6. Step 6: Final answer
    x = 9,579.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.