Home / 20,721.54-31,072.05-16,762.98

Finding the Fourth Proportional to 20,721.54, 31,072.05 and 16,762.98

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Solution

The fourth proportional to 20,721.54, 31,072.05 and 16,762.98 is: 25,136.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.54 : 31,072.05 = 16,762.98 : x
  2. Step 2: Convert to fraction form
    20,721.54/31,072.05 = 16,762.98/x
  3. Step 3: Cross multiply
    20,721.54x = 31,072.05 × 16,762.98
  4. Step 4: Simplify right side
    20,721.54x = 520,860,152.71
  5. Step 5: Solve for x
    x = 520,860,152.71/20,721.54
  6. Step 6: Final answer
    x = 25,136.17

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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.