Home / 28,347.84-39,121.92-15,772.64

Finding the Fourth Proportional to 28,347.84, 39,121.92 and 15,772.64

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Solution

The fourth proportional to 28,347.84, 39,121.92 and 15,772.64 is: 21,767.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,347.84 : 39,121.92 = 15,772.64 : x
  2. Step 2: Convert to fraction form
    28,347.84/39,121.92 = 15,772.64/x
  3. Step 3: Cross multiply
    28,347.84x = 39,121.92 × 15,772.64
  4. Step 4: Simplify right side
    28,347.84x = 617,055,960.27
  5. Step 5: Solve for x
    x = 617,055,960.27/28,347.84
  6. Step 6: Final answer
    x = 21,767.30

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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.