Home / 21,277.74-31,918.36-6,486.78

Finding the Fourth Proportional to 21,277.74, 31,918.36 and 6,486.78

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Solution

The fourth proportional to 21,277.74, 31,918.36 and 6,486.78 is: 9,730.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,277.74 : 31,918.36 = 6,486.78 : x
  2. Step 2: Convert to fraction form
    21,277.74/31,918.36 = 6,486.78/x
  3. Step 3: Cross multiply
    21,277.74x = 31,918.36 × 6,486.78
  4. Step 4: Simplify right side
    21,277.74x = 207,047,379.28
  5. Step 5: Solve for x
    x = 207,047,379.28/21,277.74
  6. Step 6: Final answer
    x = 9,730.70

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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.