Home / 8,070.18-12,105.20-4,780.90

Finding the Fourth Proportional to 8,070.18, 12,105.20 and 4,780.90

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Solution

The fourth proportional to 8,070.18, 12,105.20 and 4,780.90 is: 7,171.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,070.18 : 12,105.20 = 4,780.90 : x
  2. Step 2: Convert to fraction form
    8,070.18/12,105.20 = 4,780.90/x
  3. Step 3: Cross multiply
    8,070.18x = 12,105.20 × 4,780.90
  4. Step 4: Simplify right side
    8,070.18x = 57,873,750.87
  5. Step 5: Solve for x
    x = 57,873,750.87/8,070.18
  6. Step 6: Final answer
    x = 7,171.31

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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.