Home / 20,817.64-31,225.49-7,669.12

Finding the Fourth Proportional to 20,817.64, 31,225.49 and 7,669.12

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Solution

The fourth proportional to 20,817.64, 31,225.49 and 7,669.12 is: 11,503.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,817.64 : 31,225.49 = 7,669.12 : x
  2. Step 2: Convert to fraction form
    20,817.64/31,225.49 = 7,669.12/x
  3. Step 3: Cross multiply
    20,817.64x = 31,225.49 × 7,669.12
  4. Step 4: Simplify right side
    20,817.64x = 239,472,029.87
  5. Step 5: Solve for x
    x = 239,472,029.87/20,817.64
  6. Step 6: Final answer
    x = 11,503.32

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1.5x scale

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.