Home / 20,582.78-28,404.23-11,151.35

Finding the Fourth Proportional to 20,582.78, 28,404.23 and 11,151.35

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Solution

The fourth proportional to 20,582.78, 28,404.23 and 11,151.35 is: 15,388.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,582.78 : 28,404.23 = 11,151.35 : x
  2. Step 2: Convert to fraction form
    20,582.78/28,404.23 = 11,151.35/x
  3. Step 3: Cross multiply
    20,582.78x = 28,404.23 × 11,151.35
  4. Step 4: Simplify right side
    20,582.78x = 316,745,312.43
  5. Step 5: Solve for x
    x = 316,745,312.43/20,582.78
  6. Step 6: Final answer
    x = 15,388.85

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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.