Home / 12,399.40-18,580.52-4,999.80

Finding the Fourth Proportional to 12,399.40, 18,580.52 and 4,999.80

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Solution

The fourth proportional to 12,399.40, 18,580.52 and 4,999.80 is: 7,492.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,399.40 : 18,580.52 = 4,999.80 : x
  2. Step 2: Convert to fraction form
    12,399.40/18,580.52 = 4,999.80/x
  3. Step 3: Cross multiply
    12,399.40x = 18,580.52 × 4,999.80
  4. Step 4: Simplify right side
    12,399.40x = 92,898,883.90
  5. Step 5: Solve for x
    x = 92,898,883.90/12,399.40
  6. Step 6: Final answer
    x = 7,492.21

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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.