Home / 30,990.12-42,765.64-17,377.26

Finding the Fourth Proportional to 30,990.12, 42,765.64 and 17,377.26

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Solution

The fourth proportional to 30,990.12, 42,765.64 and 17,377.26 is: 23,980.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,990.12 : 42,765.64 = 17,377.26 : x
  2. Step 2: Convert to fraction form
    30,990.12/42,765.64 = 17,377.26/x
  3. Step 3: Cross multiply
    30,990.12x = 42,765.64 × 17,377.26
  4. Step 4: Simplify right side
    30,990.12x = 743,149,645.35
  5. Step 5: Solve for x
    x = 743,149,645.35/30,990.12
  6. Step 6: Final answer
    x = 23,980.21

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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.