Home / 21,103.36-31,654.80-11,875.84

Finding the Fourth Proportional to 21,103.36, 31,654.80 and 11,875.84

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Solution

The fourth proportional to 21,103.36, 31,654.80 and 11,875.84 is: 17,813.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,103.36 : 31,654.80 = 11,875.84 : x
  2. Step 2: Convert to fraction form
    21,103.36/31,654.80 = 11,875.84/x
  3. Step 3: Cross multiply
    21,103.36x = 31,654.80 × 11,875.84
  4. Step 4: Simplify right side
    21,103.36x = 375,927,340.03
  5. Step 5: Solve for x
    x = 375,927,340.03/21,103.36
  6. Step 6: Final answer
    x = 17,813.62

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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.