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Finding the Fourth Proportional to 20,652.09, 30,981.78 and 7,329.16

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Solution

The fourth proportional to 20,652.09, 30,981.78 and 7,329.16 is: 10,995.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,652.09 : 30,981.78 = 7,329.16 : x
  2. Step 2: Convert to fraction form
    20,652.09/30,981.78 = 7,329.16/x
  3. Step 3: Cross multiply
    20,652.09x = 30,981.78 × 7,329.16
  4. Step 4: Simplify right side
    20,652.09x = 227,070,461.43
  5. Step 5: Solve for x
    x = 227,070,461.43/20,652.09
  6. Step 6: Final answer
    x = 10,995.04

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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.