Home / 16,981.10-25,421.43-12,617.90

Finding the Fourth Proportional to 16,981.10, 25,421.43 and 12,617.90

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Solution

The fourth proportional to 16,981.10, 25,421.43 and 12,617.90 is: 18,889.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,981.10 : 25,421.43 = 12,617.90 : x
  2. Step 2: Convert to fraction form
    16,981.10/25,421.43 = 12,617.90/x
  3. Step 3: Cross multiply
    16,981.10x = 25,421.43 × 12,617.90
  4. Step 4: Simplify right side
    16,981.10x = 320,765,061.60
  5. Step 5: Solve for x
    x = 320,765,061.60/16,981.10
  6. Step 6: Final answer
    x = 18,889.53

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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.