Home / 21,140.10-31,682.64-8,645.85

Finding the Fourth Proportional to 21,140.10, 31,682.64 and 8,645.85

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Solution

The fourth proportional to 21,140.10, 31,682.64 and 8,645.85 is: 12,957.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.10 : 31,682.64 = 8,645.85 : x
  2. Step 2: Convert to fraction form
    21,140.10/31,682.64 = 8,645.85/x
  3. Step 3: Cross multiply
    21,140.10x = 31,682.64 × 8,645.85
  4. Step 4: Simplify right side
    21,140.10x = 273,923,353.04
  5. Step 5: Solve for x
    x = 273,923,353.04/21,140.10
  6. Step 6: Final answer
    x = 12,957.52

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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.