Home / 20,989.31-28,964.12-12,037.19

Finding the Fourth Proportional to 20,989.31, 28,964.12 and 12,037.19

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Solution

The fourth proportional to 20,989.31, 28,964.12 and 12,037.19 is: 16,610.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.31 : 28,964.12 = 12,037.19 : x
  2. Step 2: Convert to fraction form
    20,989.31/28,964.12 = 12,037.19/x
  3. Step 3: Cross multiply
    20,989.31x = 28,964.12 × 12,037.19
  4. Step 4: Simplify right side
    20,989.31x = 348,646,555.44
  5. Step 5: Solve for x
    x = 348,646,555.44/20,989.31
  6. Step 6: Final answer
    x = 16,610.67

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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.