Home / 28,270.80-42,406.20-10,739.70

Finding the Fourth Proportional to 28,270.80, 42,406.20 and 10,739.70

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Solution

The fourth proportional to 28,270.80, 42,406.20 and 10,739.70 is: 16,109.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,270.80 : 42,406.20 = 10,739.70 : x
  2. Step 2: Convert to fraction form
    28,270.80/42,406.20 = 10,739.70/x
  3. Step 3: Cross multiply
    28,270.80x = 42,406.20 × 10,739.70
  4. Step 4: Simplify right side
    28,270.80x = 455,429,866.14
  5. Step 5: Solve for x
    x = 455,429,866.14/28,270.80
  6. Step 6: Final answer
    x = 16,109.55

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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.