Home / 28,405.62-39,270.61-21,319.74

Finding the Fourth Proportional to 28,405.62, 39,270.61 and 21,319.74

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Solution

The fourth proportional to 28,405.62, 39,270.61 and 21,319.74 is: 29,474.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,405.62 : 39,270.61 = 21,319.74 : x
  2. Step 2: Convert to fraction form
    28,405.62/39,270.61 = 21,319.74/x
  3. Step 3: Cross multiply
    28,405.62x = 39,270.61 × 21,319.74
  4. Step 4: Simplify right side
    28,405.62x = 837,239,194.84
  5. Step 5: Solve for x
    x = 837,239,194.84/28,405.62
  6. Step 6: Final answer
    x = 29,474.42

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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.