Home / 20,991.60-28,959.26-12,037.05

Finding the Fourth Proportional to 20,991.60, 28,959.26 and 12,037.05

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Solution

The fourth proportional to 20,991.60, 28,959.26 and 12,037.05 is: 16,605.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,991.60 : 28,959.26 = 12,037.05 : x
  2. Step 2: Convert to fraction form
    20,991.60/28,959.26 = 12,037.05/x
  3. Step 3: Cross multiply
    20,991.60x = 28,959.26 × 12,037.05
  4. Step 4: Simplify right side
    20,991.60x = 348,584,000.40
  5. Step 5: Solve for x
    x = 348,584,000.40/20,991.60
  6. Step 6: Final answer
    x = 16,605.88

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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.