Home / 20,643.01-28,487.41-12,145.45

Finding the Fourth Proportional to 20,643.01, 28,487.41 and 12,145.45

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Solution

The fourth proportional to 20,643.01, 28,487.41 and 12,145.45 is: 16,760.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.01 : 28,487.41 = 12,145.45 : x
  2. Step 2: Convert to fraction form
    20,643.01/28,487.41 = 12,145.45/x
  3. Step 3: Cross multiply
    20,643.01x = 28,487.41 × 12,145.45
  4. Step 4: Simplify right side
    20,643.01x = 345,992,479.90
  5. Step 5: Solve for x
    x = 345,992,479.90/20,643.01
  6. Step 6: Final answer
    x = 16,760.76

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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.