Home / 12,457.20-18,687.60-4,135.80

Finding the Fourth Proportional to 12,457.20, 18,687.60 and 4,135.80

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Solution

The fourth proportional to 12,457.20, 18,687.60 and 4,135.80 is: 6,204.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,457.20 : 18,687.60 = 4,135.80 : x
  2. Step 2: Convert to fraction form
    12,457.20/18,687.60 = 4,135.80/x
  3. Step 3: Cross multiply
    12,457.20x = 18,687.60 × 4,135.80
  4. Step 4: Simplify right side
    12,457.20x = 77,288,176.08
  5. Step 5: Solve for x
    x = 77,288,176.08/12,457.20
  6. Step 6: Final answer
    x = 6,204.30

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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.