Home / 12,991.30-19,475.26-4,669.36

Finding the Fourth Proportional to 12,991.30, 19,475.26 and 4,669.36

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Solution

The fourth proportional to 12,991.30, 19,475.26 and 4,669.36 is: 6,999.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,991.30 : 19,475.26 = 4,669.36 : x
  2. Step 2: Convert to fraction form
    12,991.30/19,475.26 = 4,669.36/x
  3. Step 3: Cross multiply
    12,991.30x = 19,475.26 × 4,669.36
  4. Step 4: Simplify right side
    12,991.30x = 90,937,000.03
  5. Step 5: Solve for x
    x = 90,937,000.03/12,991.30
  6. Step 6: Final answer
    x = 6,999.84

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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.