Home / 21,157.61-31,755.45-11,305.31

Finding the Fourth Proportional to 21,157.61, 31,755.45 and 11,305.31

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Solution

The fourth proportional to 21,157.61, 31,755.45 and 11,305.31 is: 16,968.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,157.61 : 31,755.45 = 11,305.31 : x
  2. Step 2: Convert to fraction form
    21,157.61/31,755.45 = 11,305.31/x
  3. Step 3: Cross multiply
    21,157.61x = 31,755.45 × 11,305.31
  4. Step 4: Simplify right side
    21,157.61x = 359,005,206.44
  5. Step 5: Solve for x
    x = 359,005,206.44/21,157.61
  6. Step 6: Final answer
    x = 16,968.14

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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.