Home / 28,462.14-39,280.41-21,279.60

Finding the Fourth Proportional to 28,462.14, 39,280.41 and 21,279.60

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Solution

The fourth proportional to 28,462.14, 39,280.41 and 21,279.60 is: 29,367.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,462.14 : 39,280.41 = 21,279.60 : x
  2. Step 2: Convert to fraction form
    28,462.14/39,280.41 = 21,279.60/x
  3. Step 3: Cross multiply
    28,462.14x = 39,280.41 × 21,279.60
  4. Step 4: Simplify right side
    28,462.14x = 835,871,412.64
  5. Step 5: Solve for x
    x = 835,871,412.64/28,462.14
  6. Step 6: Final answer
    x = 29,367.83

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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.