Home / 20,403.40-28,145.46-12,018.28

Finding the Fourth Proportional to 20,403.40, 28,145.46 and 12,018.28

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Solution

The fourth proportional to 20,403.40, 28,145.46 and 12,018.28 is: 16,578.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,403.40 : 28,145.46 = 12,018.28 : x
  2. Step 2: Convert to fraction form
    20,403.40/28,145.46 = 12,018.28/x
  3. Step 3: Cross multiply
    20,403.40x = 28,145.46 × 12,018.28
  4. Step 4: Simplify right side
    20,403.40x = 338,260,019.01
  5. Step 5: Solve for x
    x = 338,260,019.01/20,403.40
  6. Step 6: Final answer
    x = 16,578.61

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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.