Home / 20,579.62-28,400.08-11,148.26

Finding the Fourth Proportional to 20,579.62, 28,400.08 and 11,148.26

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Solution

The fourth proportional to 20,579.62, 28,400.08 and 11,148.26 is: 15,384.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,579.62 : 28,400.08 = 11,148.26 : x
  2. Step 2: Convert to fraction form
    20,579.62/28,400.08 = 11,148.26/x
  3. Step 3: Cross multiply
    20,579.62x = 28,400.08 × 11,148.26
  4. Step 4: Simplify right side
    20,579.62x = 316,611,475.86
  5. Step 5: Solve for x
    x = 316,611,475.86/20,579.62
  6. Step 6: Final answer
    x = 15,384.71

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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.