Home / 8,118.90-12,178.35-4,653.30

Finding the Fourth Proportional to 8,118.90, 12,178.35 and 4,653.30

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Solution

The fourth proportional to 8,118.90, 12,178.35 and 4,653.30 is: 6,979.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,118.90 : 12,178.35 = 4,653.30 : x
  2. Step 2: Convert to fraction form
    8,118.90/12,178.35 = 4,653.30/x
  3. Step 3: Cross multiply
    8,118.90x = 12,178.35 × 4,653.30
  4. Step 4: Simplify right side
    8,118.90x = 56,669,516.06
  5. Step 5: Solve for x
    x = 56,669,516.06/8,118.90
  6. Step 6: Final answer
    x = 6,979.95

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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.