Home / 8,520.90-12,777.72-2,972.60

Finding the Fourth Proportional to 8,520.90, 12,777.72 and 2,972.60

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Solution

The fourth proportional to 8,520.90, 12,777.72 and 2,972.60 is: 4,457.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,520.90 : 12,777.72 = 2,972.60 : x
  2. Step 2: Convert to fraction form
    8,520.90/12,777.72 = 2,972.60/x
  3. Step 3: Cross multiply
    8,520.90x = 12,777.72 × 2,972.60
  4. Step 4: Simplify right side
    8,520.90x = 37,983,050.47
  5. Step 5: Solve for x
    x = 37,983,050.47/8,520.90
  6. Step 6: Final answer
    x = 4,457.63

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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.