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Finding the Fourth Proportional to 30,590.58, 42,215.41 and 18,489.41

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Solution

The fourth proportional to 30,590.58, 42,215.41 and 18,489.41 is: 25,515.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,590.58 : 42,215.41 = 18,489.41 : x
  2. Step 2: Convert to fraction form
    30,590.58/42,215.41 = 18,489.41/x
  3. Step 3: Cross multiply
    30,590.58x = 42,215.41 × 18,489.41
  4. Step 4: Simplify right side
    30,590.58x = 780,538,023.81
  5. Step 5: Solve for x
    x = 780,538,023.81/30,590.58
  6. Step 6: Final answer
    x = 25,515.63

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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.