Home / 21,283.83-31,914.80-11,431.39

Finding the Fourth Proportional to 21,283.83, 31,914.80 and 11,431.39

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Solution

The fourth proportional to 21,283.83, 31,914.80 and 11,431.39 is: 17,141.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,283.83 : 31,914.80 = 11,431.39 : x
  2. Step 2: Convert to fraction form
    21,283.83/31,914.80 = 11,431.39/x
  3. Step 3: Cross multiply
    21,283.83x = 31,914.80 × 11,431.39
  4. Step 4: Simplify right side
    21,283.83x = 364,830,592.48
  5. Step 5: Solve for x
    x = 364,830,592.48/21,283.83
  6. Step 6: Final answer
    x = 17,141.21

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1.5x scale

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.