Home / 21,621.90-32,391.09-13,277.70

Finding the Fourth Proportional to 21,621.90, 32,391.09 and 13,277.70

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Solution

The fourth proportional to 21,621.90, 32,391.09 and 13,277.70 is: 19,890.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,621.90 : 32,391.09 = 13,277.70 : x
  2. Step 2: Convert to fraction form
    21,621.90/32,391.09 = 13,277.70/x
  3. Step 3: Cross multiply
    21,621.90x = 32,391.09 × 13,277.70
  4. Step 4: Simplify right side
    21,621.90x = 430,079,175.69
  5. Step 5: Solve for x
    x = 430,079,175.69/21,621.90
  6. Step 6: Final answer
    x = 19,890.91

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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.