Home / 30,752.35-42,445.15-20,135.81

Finding the Fourth Proportional to 30,752.35, 42,445.15 and 20,135.81

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Solution

The fourth proportional to 30,752.35, 42,445.15 and 20,135.81 is: 27,791.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,752.35 : 42,445.15 = 20,135.81 : x
  2. Step 2: Convert to fraction form
    30,752.35/42,445.15 = 20,135.81/x
  3. Step 3: Cross multiply
    30,752.35x = 42,445.15 × 20,135.81
  4. Step 4: Simplify right side
    30,752.35x = 854,667,531.59
  5. Step 5: Solve for x
    x = 854,667,531.59/30,752.35
  6. Step 6: Final answer
    x = 27,791.94

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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.