Home / 20,814.89-31,222.16-8,977.02

Finding the Fourth Proportional to 20,814.89, 31,222.16 and 8,977.02

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Solution

The fourth proportional to 20,814.89, 31,222.16 and 8,977.02 is: 13,465.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,814.89 : 31,222.16 = 8,977.02 : x
  2. Step 2: Convert to fraction form
    20,814.89/31,222.16 = 8,977.02/x
  3. Step 3: Cross multiply
    20,814.89x = 31,222.16 × 8,977.02
  4. Step 4: Simplify right side
    20,814.89x = 280,281,909.88
  5. Step 5: Solve for x
    x = 280,281,909.88/20,814.89
  6. Step 6: Final answer
    x = 13,465.46

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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.