Home / 20,697.68-28,560.64-12,084.16

Finding the Fourth Proportional to 20,697.68, 28,560.64 and 12,084.16

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Solution

The fourth proportional to 20,697.68, 28,560.64 and 12,084.16 is: 16,674.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,697.68 : 28,560.64 = 12,084.16 : x
  2. Step 2: Convert to fraction form
    20,697.68/28,560.64 = 12,084.16/x
  3. Step 3: Cross multiply
    20,697.68x = 28,560.64 × 12,084.16
  4. Step 4: Simplify right side
    20,697.68x = 345,131,343.46
  5. Step 5: Solve for x
    x = 345,131,343.46/20,697.68
  6. Step 6: Final answer
    x = 16,674.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.