Home / 8,070.72-12,108.60-3,140.40

Finding the Fourth Proportional to 8,070.72, 12,108.60 and 3,140.40

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Solution

The fourth proportional to 8,070.72, 12,108.60 and 3,140.40 is: 4,711.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,070.72 : 12,108.60 = 3,140.40 : x
  2. Step 2: Convert to fraction form
    8,070.72/12,108.60 = 3,140.40/x
  3. Step 3: Cross multiply
    8,070.72x = 12,108.60 × 3,140.40
  4. Step 4: Simplify right side
    8,070.72x = 38,025,847.44
  5. Step 5: Solve for x
    x = 38,025,847.44/8,070.72
  6. Step 6: Final answer
    x = 4,711.58

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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.