Home / 21,177.36-31,703.64-15,655.32

Finding the Fourth Proportional to 21,177.36, 31,703.64 and 15,655.32

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Solution

The fourth proportional to 21,177.36, 31,703.64 and 15,655.32 is: 23,436.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,177.36 : 31,703.64 = 15,655.32 : x
  2. Step 2: Convert to fraction form
    21,177.36/31,703.64 = 15,655.32/x
  3. Step 3: Cross multiply
    21,177.36x = 31,703.64 × 15,655.32
  4. Step 4: Simplify right side
    21,177.36x = 496,330,629.36
  5. Step 5: Solve for x
    x = 496,330,629.36/21,177.36
  6. Step 6: Final answer
    x = 23,436.85

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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.