Home / 20,847.04-28,771.68-13,416.64

Finding the Fourth Proportional to 20,847.04, 28,771.68 and 13,416.64

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Solution

The fourth proportional to 20,847.04, 28,771.68 and 13,416.64 is: 18,516.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,847.04 : 28,771.68 = 13,416.64 : x
  2. Step 2: Convert to fraction form
    20,847.04/28,771.68 = 13,416.64/x
  3. Step 3: Cross multiply
    20,847.04x = 28,771.68 × 13,416.64
  4. Step 4: Simplify right side
    20,847.04x = 386,019,272.76
  5. Step 5: Solve for x
    x = 386,019,272.76/20,847.04
  6. Step 6: Final answer
    x = 18,516.74

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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.