Home / 8,521.20-12,783.42-2,678.13

Finding the Fourth Proportional to 8,521.20, 12,783.42 and 2,678.13

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Solution

The fourth proportional to 8,521.20, 12,783.42 and 2,678.13 is: 4,017.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,521.20 : 12,783.42 = 2,678.13 : x
  2. Step 2: Convert to fraction form
    8,521.20/12,783.42 = 2,678.13/x
  3. Step 3: Cross multiply
    8,521.20x = 12,783.42 × 2,678.13
  4. Step 4: Simplify right side
    8,521.20x = 34,235,660.60
  5. Step 5: Solve for x
    x = 34,235,660.60/8,521.20
  6. Step 6: Final answer
    x = 4,017.70

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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.