Home / 21,041.60-31,546.40-10,660.80

Finding the Fourth Proportional to 21,041.60, 31,546.40 and 10,660.80

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Solution

The fourth proportional to 21,041.60, 31,546.40 and 10,660.80 is: 15,983.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,041.60 : 31,546.40 = 10,660.80 : x
  2. Step 2: Convert to fraction form
    21,041.60/31,546.40 = 10,660.80/x
  3. Step 3: Cross multiply
    21,041.60x = 31,546.40 × 10,660.80
  4. Step 4: Simplify right side
    21,041.60x = 336,309,861.12
  5. Step 5: Solve for x
    x = 336,309,861.12/21,041.60
  6. Step 6: Final answer
    x = 15,983.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.