Home / 30,705.80-45,949.35-21,301.70

Finding the Fourth Proportional to 30,705.80, 45,949.35 and 21,301.70

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Solution

The fourth proportional to 30,705.80, 45,949.35 and 21,301.70 is: 31,876.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,705.80 : 45,949.35 = 21,301.70 : x
  2. Step 2: Convert to fraction form
    30,705.80/45,949.35 = 21,301.70/x
  3. Step 3: Cross multiply
    30,705.80x = 45,949.35 × 21,301.70
  4. Step 4: Simplify right side
    30,705.80x = 978,799,268.90
  5. Step 5: Solve for x
    x = 978,799,268.90/30,705.80
  6. Step 6: Final answer
    x = 31,876.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.