Home / 21,110.29-31,637.95-8,615.65

Finding the Fourth Proportional to 21,110.29, 31,637.95 and 8,615.65

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Solution

The fourth proportional to 21,110.29, 31,637.95 and 8,615.65 is: 12,912.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,110.29 : 31,637.95 = 8,615.65 : x
  2. Step 2: Convert to fraction form
    21,110.29/31,637.95 = 8,615.65/x
  3. Step 3: Cross multiply
    21,110.29x = 31,637.95 × 8,615.65
  4. Step 4: Simplify right side
    21,110.29x = 272,581,503.92
  5. Step 5: Solve for x
    x = 272,581,503.92/21,110.29
  6. Step 6: Final answer
    x = 12,912.26

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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.