Home / 10,780.86-16,171.38-2,990.28

Finding the Fourth Proportional to 10,780.86, 16,171.38 and 2,990.28

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Solution

The fourth proportional to 10,780.86, 16,171.38 and 2,990.28 is: 4,485.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,780.86 : 16,171.38 = 2,990.28 : x
  2. Step 2: Convert to fraction form
    10,780.86/16,171.38 = 2,990.28/x
  3. Step 3: Cross multiply
    10,780.86x = 16,171.38 × 2,990.28
  4. Step 4: Simplify right side
    10,780.86x = 48,356,954.19
  5. Step 5: Solve for x
    x = 48,356,954.19/10,780.86
  6. Step 6: Final answer
    x = 4,485.44

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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.