Home / 20,765.46-28,660.05-12,382.50

Finding the Fourth Proportional to 20,765.46, 28,660.05 and 12,382.50

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Solution

The fourth proportional to 20,765.46, 28,660.05 and 12,382.50 is: 17,090.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.46 : 28,660.05 = 12,382.50 : x
  2. Step 2: Convert to fraction form
    20,765.46/28,660.05 = 12,382.50/x
  3. Step 3: Cross multiply
    20,765.46x = 28,660.05 × 12,382.50
  4. Step 4: Simplify right side
    20,765.46x = 354,883,069.13
  5. Step 5: Solve for x
    x = 354,883,069.13/20,765.46
  6. Step 6: Final answer
    x = 17,090.07

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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.