Home / 21,932.51-30,261.80-12,977.15

Finding the Fourth Proportional to 21,932.51, 30,261.80 and 12,977.15

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Solution

The fourth proportional to 21,932.51, 30,261.80 and 12,977.15 is: 17,905.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,932.51 : 30,261.80 = 12,977.15 : x
  2. Step 2: Convert to fraction form
    21,932.51/30,261.80 = 12,977.15/x
  3. Step 3: Cross multiply
    21,932.51x = 30,261.80 × 12,977.15
  4. Step 4: Simplify right side
    21,932.51x = 392,711,799.00
  5. Step 5: Solve for x
    x = 392,711,799.00/21,932.51
  6. Step 6: Final answer
    x = 17,905.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.