Home / 21,309.90-31,963.70-6,518.82

Finding the Fourth Proportional to 21,309.90, 31,963.70 and 6,518.82

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Solution

The fourth proportional to 21,309.90, 31,963.70 and 6,518.82 is: 9,777.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,309.90 : 31,963.70 = 6,518.82 : x
  2. Step 2: Convert to fraction form
    21,309.90/31,963.70 = 6,518.82/x
  3. Step 3: Cross multiply
    21,309.90x = 31,963.70 × 6,518.82
  4. Step 4: Simplify right side
    21,309.90x = 208,365,623.13
  5. Step 5: Solve for x
    x = 208,365,623.13/21,309.90
  6. Step 6: Final answer
    x = 9,777.88

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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.