Home / 30,789.32-42,489.73-18,039.45

Finding the Fourth Proportional to 30,789.32, 42,489.73 and 18,039.45

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Solution

The fourth proportional to 30,789.32, 42,489.73 and 18,039.45 is: 24,894.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,789.32 : 42,489.73 = 18,039.45 : x
  2. Step 2: Convert to fraction form
    30,789.32/42,489.73 = 18,039.45/x
  3. Step 3: Cross multiply
    30,789.32x = 42,489.73 × 18,039.45
  4. Step 4: Simplify right side
    30,789.32x = 766,491,155.41
  5. Step 5: Solve for x
    x = 766,491,155.41/30,789.32
  6. Step 6: Final answer
    x = 24,894.71

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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.