Home / 20,885.64-28,821.79-11,810.88

Finding the Fourth Proportional to 20,885.64, 28,821.79 and 11,810.88

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Solution

The fourth proportional to 20,885.64, 28,821.79 and 11,810.88 is: 16,298.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.64 : 28,821.79 = 11,810.88 : x
  2. Step 2: Convert to fraction form
    20,885.64/28,821.79 = 11,810.88/x
  3. Step 3: Cross multiply
    20,885.64x = 28,821.79 × 11,810.88
  4. Step 4: Simplify right side
    20,885.64x = 340,410,703.08
  5. Step 5: Solve for x
    x = 340,410,703.08/20,885.64
  6. Step 6: Final answer
    x = 16,298.79

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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.