Home / 30,713.73-42,348.36-20,620.72

Finding the Fourth Proportional to 30,713.73, 42,348.36 and 20,620.72

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Solution

The fourth proportional to 30,713.73, 42,348.36 and 20,620.72 is: 28,432.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,713.73 : 42,348.36 = 20,620.72 : x
  2. Step 2: Convert to fraction form
    30,713.73/42,348.36 = 20,620.72/x
  3. Step 3: Cross multiply
    30,713.73x = 42,348.36 × 20,620.72
  4. Step 4: Simplify right side
    30,713.73x = 873,253,674.02
  5. Step 5: Solve for x
    x = 873,253,674.02/30,713.73
  6. Step 6: Final answer
    x = 28,432.03

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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.