Home / 20,944.85-28,905.05-11,990.30

Finding the Fourth Proportional to 20,944.85, 28,905.05 and 11,990.30

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Solution

The fourth proportional to 20,944.85, 28,905.05 and 11,990.30 is: 16,547.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,944.85 : 28,905.05 = 11,990.30 : x
  2. Step 2: Convert to fraction form
    20,944.85/28,905.05 = 11,990.30/x
  3. Step 3: Cross multiply
    20,944.85x = 28,905.05 × 11,990.30
  4. Step 4: Simplify right side
    20,944.85x = 346,580,106.47
  5. Step 5: Solve for x
    x = 346,580,106.47/20,944.85
  6. Step 6: Final answer
    x = 16,547.27

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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.