Home / 30,631.55-42,240.42-28,845.68

Finding the Fourth Proportional to 30,631.55, 42,240.42 and 28,845.68

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Solution

The fourth proportional to 30,631.55, 42,240.42 and 28,845.68 is: 39,777.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,631.55 : 42,240.42 = 28,845.68 : x
  2. Step 2: Convert to fraction form
    30,631.55/42,240.42 = 28,845.68/x
  3. Step 3: Cross multiply
    30,631.55x = 42,240.42 × 28,845.68
  4. Step 4: Simplify right side
    30,631.55x = 1,218,453,427.18
  5. Step 5: Solve for x
    x = 1,218,453,427.18/30,631.55
  6. Step 6: Final answer
    x = 39,777.73

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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.