Home / 28,363-39,140.94-15,787.48

Finding the Fourth Proportional to 28,363, 39,140.94 and 15,787.48

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Solution

The fourth proportional to 28,363, 39,140.94 and 15,787.48 is: 21,786.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,363 : 39,140.94 = 15,787.48 : x
  2. Step 2: Convert to fraction form
    28,363/39,140.94 = 15,787.48/x
  3. Step 3: Cross multiply
    28,363x = 39,140.94 × 15,787.48
  4. Step 4: Simplify right side
    28,363x = 617,936,807.43
  5. Step 5: Solve for x
    x = 617,936,807.43/28,363
  6. Step 6: Final answer
    x = 21,786.72

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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.