Home / 21,144.96-31,721.28-9,457.92

Finding the Fourth Proportional to 21,144.96, 31,721.28 and 9,457.92

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Solution

The fourth proportional to 21,144.96, 31,721.28 and 9,457.92 is: 14,188.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,144.96 : 31,721.28 = 9,457.92 : x
  2. Step 2: Convert to fraction form
    21,144.96/31,721.28 = 9,457.92/x
  3. Step 3: Cross multiply
    21,144.96x = 31,721.28 × 9,457.92
  4. Step 4: Simplify right side
    21,144.96x = 300,017,328.54
  5. Step 5: Solve for x
    x = 300,017,328.54/21,144.96
  6. Step 6: Final answer
    x = 14,188.60

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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.