Home / 8,178.72-12,271.32-2,988.24

Finding the Fourth Proportional to 8,178.72, 12,271.32 and 2,988.24

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Solution

The fourth proportional to 8,178.72, 12,271.32 and 2,988.24 is: 4,483.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,178.72 : 12,271.32 = 2,988.24 : x
  2. Step 2: Convert to fraction form
    8,178.72/12,271.32 = 2,988.24/x
  3. Step 3: Cross multiply
    8,178.72x = 12,271.32 × 2,988.24
  4. Step 4: Simplify right side
    8,178.72x = 36,669,649.28
  5. Step 5: Solve for x
    x = 36,669,649.28/8,178.72
  6. Step 6: Final answer
    x = 4,483.54

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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.