Home / 30,936.80-42,670.73-28,392.76

Finding the Fourth Proportional to 30,936.80, 42,670.73 and 28,392.76

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Solution

The fourth proportional to 30,936.80, 42,670.73 and 28,392.76 is: 39,161.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,936.80 : 42,670.73 = 28,392.76 : x
  2. Step 2: Convert to fraction form
    30,936.80/42,670.73 = 28,392.76/x
  3. Step 3: Cross multiply
    30,936.80x = 42,670.73 × 28,392.76
  4. Step 4: Simplify right side
    30,936.80x = 1,211,539,920.24
  5. Step 5: Solve for x
    x = 1,211,539,920.24/30,936.80
  6. Step 6: Final answer
    x = 39,161.77

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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.