Home / 21,021.08-31,512.65-7,684.76

Finding the Fourth Proportional to 21,021.08, 31,512.65 and 7,684.76

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Solution

The fourth proportional to 21,021.08, 31,512.65 and 7,684.76 is: 11,520.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021.08 : 31,512.65 = 7,684.76 : x
  2. Step 2: Convert to fraction form
    21,021.08/31,512.65 = 7,684.76/x
  3. Step 3: Cross multiply
    21,021.08x = 31,512.65 × 7,684.76
  4. Step 4: Simplify right side
    21,021.08x = 242,167,192.57
  5. Step 5: Solve for x
    x = 242,167,192.57/21,021.08
  6. Step 6: Final answer
    x = 11,520.21

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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.