Home / 10,780.80-16,172.08-2,989.60

Finding the Fourth Proportional to 10,780.80, 16,172.08 and 2,989.60

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Solution

The fourth proportional to 10,780.80, 16,172.08 and 2,989.60 is: 4,484.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,780.80 : 16,172.08 = 2,989.60 : x
  2. Step 2: Convert to fraction form
    10,780.80/16,172.08 = 2,989.60/x
  3. Step 3: Cross multiply
    10,780.80x = 16,172.08 × 2,989.60
  4. Step 4: Simplify right side
    10,780.80x = 48,348,050.37
  5. Step 5: Solve for x
    x = 48,348,050.37/10,780.80
  6. Step 6: Final answer
    x = 4,484.64

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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.