Home / 13,021.60-19,528.80-5,231.20

Finding the Fourth Proportional to 13,021.60, 19,528.80 and 5,231.20

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Solution

The fourth proportional to 13,021.60, 19,528.80 and 5,231.20 is: 7,845.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,021.60 : 19,528.80 = 5,231.20 : x
  2. Step 2: Convert to fraction form
    13,021.60/19,528.80 = 5,231.20/x
  3. Step 3: Cross multiply
    13,021.60x = 19,528.80 × 5,231.20
  4. Step 4: Simplify right side
    13,021.60x = 102,159,058.56
  5. Step 5: Solve for x
    x = 102,159,058.56/13,021.60
  6. Step 6: Final answer
    x = 7,845.35

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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.