Home / 21,184.35-31,721.85-16,810.35

Finding the Fourth Proportional to 21,184.35, 31,721.85 and 16,810.35

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Solution

The fourth proportional to 21,184.35, 31,721.85 and 16,810.35 is: 25,172.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,184.35 : 31,721.85 = 16,810.35 : x
  2. Step 2: Convert to fraction form
    21,184.35/31,721.85 = 16,810.35/x
  3. Step 3: Cross multiply
    21,184.35x = 31,721.85 × 16,810.35
  4. Step 4: Simplify right side
    21,184.35x = 533,255,401.15
  5. Step 5: Solve for x
    x = 533,255,401.15/21,184.35
  6. Step 6: Final answer
    x = 25,172.14

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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.