Home / 21,084.88-31,656.48-10,703.92

Finding the Fourth Proportional to 21,084.88, 31,656.48 and 10,703.92

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Solution

The fourth proportional to 21,084.88, 31,656.48 and 10,703.92 is: 16,070.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,084.88 : 31,656.48 = 10,703.92 : x
  2. Step 2: Convert to fraction form
    21,084.88/31,656.48 = 10,703.92/x
  3. Step 3: Cross multiply
    21,084.88x = 31,656.48 × 10,703.92
  4. Step 4: Simplify right side
    21,084.88x = 338,848,429.40
  5. Step 5: Solve for x
    x = 338,848,429.40/21,084.88
  6. Step 6: Final answer
    x = 16,070.68

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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.