Home / 30,431.54-42,179.59-28,679.53

Finding the Fourth Proportional to 30,431.54, 42,179.59 and 28,679.53

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Solution

The fourth proportional to 30,431.54, 42,179.59 and 28,679.53 is: 39,751.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,431.54 : 42,179.59 = 28,679.53 : x
  2. Step 2: Convert to fraction form
    30,431.54/42,179.59 = 28,679.53/x
  3. Step 3: Cross multiply
    30,431.54x = 42,179.59 × 28,679.53
  4. Step 4: Simplify right side
    30,431.54x = 1,209,690,673.40
  5. Step 5: Solve for x
    x = 1,209,690,673.40/30,431.54
  6. Step 6: Final answer
    x = 39,751.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.