Home / 30,899.79-46,387.56-20,378.61

Finding the Fourth Proportional to 30,899.79, 46,387.56 and 20,378.61

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Solution

The fourth proportional to 30,899.79, 46,387.56 and 20,378.61 is: 30,592.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,899.79 : 46,387.56 = 20,378.61 : x
  2. Step 2: Convert to fraction form
    30,899.79/46,387.56 = 20,378.61/x
  3. Step 3: Cross multiply
    30,899.79x = 46,387.56 × 20,378.61
  4. Step 4: Simplify right side
    30,899.79x = 945,313,994.09
  5. Step 5: Solve for x
    x = 945,313,994.09/30,899.79
  6. Step 6: Final answer
    x = 30,592.89

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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.