Home / 21,309.80-31,964.70-17,623.40

Finding the Fourth Proportional to 21,309.80, 31,964.70 and 17,623.40

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Solution

The fourth proportional to 21,309.80, 31,964.70 and 17,623.40 is: 26,435.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,309.80 : 31,964.70 = 17,623.40 : x
  2. Step 2: Convert to fraction form
    21,309.80/31,964.70 = 17,623.40/x
  3. Step 3: Cross multiply
    21,309.80x = 31,964.70 × 17,623.40
  4. Step 4: Simplify right side
    21,309.80x = 563,326,693.98
  5. Step 5: Solve for x
    x = 563,326,693.98/21,309.80
  6. Step 6: Final answer
    x = 26,435.10

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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.