Home / 21,126.12-31,693.98-11,260.20

Finding the Fourth Proportional to 21,126.12, 31,693.98 and 11,260.20

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Solution

The fourth proportional to 21,126.12, 31,693.98 and 11,260.20 is: 16,892.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,126.12 : 31,693.98 = 11,260.20 : x
  2. Step 2: Convert to fraction form
    21,126.12/31,693.98 = 11,260.20/x
  3. Step 3: Cross multiply
    21,126.12x = 31,693.98 × 11,260.20
  4. Step 4: Simplify right side
    21,126.12x = 356,880,553.60
  5. Step 5: Solve for x
    x = 356,880,553.60/21,126.12
  6. Step 6: Final answer
    x = 16,892.86

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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.