Home / 21,047.13-31,579.35-15,453.36

Finding the Fourth Proportional to 21,047.13, 31,579.35 and 15,453.36

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Solution

The fourth proportional to 21,047.13, 31,579.35 and 15,453.36 is: 23,186.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,047.13 : 31,579.35 = 15,453.36 : x
  2. Step 2: Convert to fraction form
    21,047.13/31,579.35 = 15,453.36/x
  3. Step 3: Cross multiply
    21,047.13x = 31,579.35 × 15,453.36
  4. Step 4: Simplify right side
    21,047.13x = 488,006,828.95
  5. Step 5: Solve for x
    x = 488,006,828.95/21,047.13
  6. Step 6: Final answer
    x = 23,186.39

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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.