Home / 25,731.76-38,389.70-21,990.64

Finding the Fourth Proportional to 25,731.76, 38,389.70 and 21,990.64

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Solution

The fourth proportional to 25,731.76, 38,389.70 and 21,990.64 is: 32,808.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,731.76 : 38,389.70 = 21,990.64 : x
  2. Step 2: Convert to fraction form
    25,731.76/38,389.70 = 21,990.64/x
  3. Step 3: Cross multiply
    25,731.76x = 38,389.70 × 21,990.64
  4. Step 4: Simplify right side
    25,731.76x = 844,214,072.41
  5. Step 5: Solve for x
    x = 844,214,072.41/25,731.76
  6. Step 6: Final answer
    x = 32,808.25

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.