Home / 10,787.50-16,185.12-4,218.40

Finding the Fourth Proportional to 10,787.50, 16,185.12 and 4,218.40

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Solution

The fourth proportional to 10,787.50, 16,185.12 and 4,218.40 is: 6,329.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,787.50 : 16,185.12 = 4,218.40 : x
  2. Step 2: Convert to fraction form
    10,787.50/16,185.12 = 4,218.40/x
  3. Step 3: Cross multiply
    10,787.50x = 16,185.12 × 4,218.40
  4. Step 4: Simplify right side
    10,787.50x = 68,275,310.21
  5. Step 5: Solve for x
    x = 68,275,310.21/10,787.50
  6. Step 6: Final answer
    x = 6,329.11

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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.