Home / 20,652.64-28,500.80-11,221.24

Finding the Fourth Proportional to 20,652.64, 28,500.80 and 11,221.24

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Solution

The fourth proportional to 20,652.64, 28,500.80 and 11,221.24 is: 15,485.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,652.64 : 28,500.80 = 11,221.24 : x
  2. Step 2: Convert to fraction form
    20,652.64/28,500.80 = 11,221.24/x
  3. Step 3: Cross multiply
    20,652.64x = 28,500.80 × 11,221.24
  4. Step 4: Simplify right side
    20,652.64x = 319,814,316.99
  5. Step 5: Solve for x
    x = 319,814,316.99/20,652.64
  6. Step 6: Final answer
    x = 15,485.40

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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.