Home / 21,013.28-31,487.06-17,880.41

Finding the Fourth Proportional to 21,013.28, 31,487.06 and 17,880.41

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Solution

The fourth proportional to 21,013.28, 31,487.06 and 17,880.41 is: 26,792.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,013.28 : 31,487.06 = 17,880.41 : x
  2. Step 2: Convert to fraction form
    21,013.28/31,487.06 = 17,880.41/x
  3. Step 3: Cross multiply
    21,013.28x = 31,487.06 × 17,880.41
  4. Step 4: Simplify right side
    21,013.28x = 563,001,295.66
  5. Step 5: Solve for x
    x = 563,001,295.66/21,013.28
  6. Step 6: Final answer
    x = 26,792.65

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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.