Home / 20,644.71-28,490.39-12,145.32

Finding the Fourth Proportional to 20,644.71, 28,490.39 and 12,145.32

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Solution

The fourth proportional to 20,644.71, 28,490.39 and 12,145.32 is: 16,760.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,644.71 : 28,490.39 = 12,145.32 : x
  2. Step 2: Convert to fraction form
    20,644.71/28,490.39 = 12,145.32/x
  3. Step 3: Cross multiply
    20,644.71x = 28,490.39 × 12,145.32
  4. Step 4: Simplify right side
    20,644.71x = 346,024,842.75
  5. Step 5: Solve for x
    x = 346,024,842.75/20,644.71
  6. Step 6: Final answer
    x = 16,760.94

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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.