Home / 20,145.20-30,185.40-10,269.68

Finding the Fourth Proportional to 20,145.20, 30,185.40 and 10,269.68

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Solution

The fourth proportional to 20,145.20, 30,185.40 and 10,269.68 is: 15,388.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,145.20 : 30,185.40 = 10,269.68 : x
  2. Step 2: Convert to fraction form
    20,145.20/30,185.40 = 10,269.68/x
  3. Step 3: Cross multiply
    20,145.20x = 30,185.40 × 10,269.68
  4. Step 4: Simplify right side
    20,145.20x = 309,994,398.67
  5. Step 5: Solve for x
    x = 309,994,398.67/20,145.20
  6. Step 6: Final answer
    x = 15,388.00

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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.