Home / 21,072.95-31,624.98-9,979.62

Finding the Fourth Proportional to 21,072.95, 31,624.98 and 9,979.62

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Solution

The fourth proportional to 21,072.95, 31,624.98 and 9,979.62 is: 14,976.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,072.95 : 31,624.98 = 9,979.62 : x
  2. Step 2: Convert to fraction form
    21,072.95/31,624.98 = 9,979.62/x
  3. Step 3: Cross multiply
    21,072.95x = 31,624.98 × 9,979.62
  4. Step 4: Simplify right side
    21,072.95x = 315,605,126.89
  5. Step 5: Solve for x
    x = 315,605,126.89/21,072.95
  6. Step 6: Final answer
    x = 14,976.79

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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.