Home / 12,312.30-18,469.73-3,991.98

Finding the Fourth Proportional to 12,312.30, 18,469.73 and 3,991.98

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Solution

The fourth proportional to 12,312.30, 18,469.73 and 3,991.98 is: 5,988.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,312.30 : 18,469.73 = 3,991.98 : x
  2. Step 2: Convert to fraction form
    12,312.30/18,469.73 = 3,991.98/x
  3. Step 3: Cross multiply
    12,312.30x = 18,469.73 × 3,991.98
  4. Step 4: Simplify right side
    12,312.30x = 73,730,802.75
  5. Step 5: Solve for x
    x = 73,730,802.75/12,312.30
  6. Step 6: Final answer
    x = 5,988.39

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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.