Home / 21,347.64-31,995.54-15,109.48

Finding the Fourth Proportional to 21,347.64, 31,995.54 and 15,109.48

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Solution

The fourth proportional to 21,347.64, 31,995.54 and 15,109.48 is: 22,645.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,347.64 : 31,995.54 = 15,109.48 : x
  2. Step 2: Convert to fraction form
    21,347.64/31,995.54 = 15,109.48/x
  3. Step 3: Cross multiply
    21,347.64x = 31,995.54 × 15,109.48
  4. Step 4: Simplify right side
    21,347.64x = 483,435,971.72
  5. Step 5: Solve for x
    x = 483,435,971.72/21,347.64
  6. Step 6: Final answer
    x = 22,645.87

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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.