Home / 21,004.20-31,506.30-10,506.60

Finding the Fourth Proportional to 21,004.20, 31,506.30 and 10,506.60

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Solution

The fourth proportional to 21,004.20, 31,506.30 and 10,506.60 is: 15,759.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,004.20 : 31,506.30 = 10,506.60 : x
  2. Step 2: Convert to fraction form
    21,004.20/31,506.30 = 10,506.60/x
  3. Step 3: Cross multiply
    21,004.20x = 31,506.30 × 10,506.60
  4. Step 4: Simplify right side
    21,004.20x = 331,024,091.58
  5. Step 5: Solve for x
    x = 331,024,091.58/21,004.20
  6. Step 6: Final answer
    x = 15,759.90

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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.