Home / 20,495.78-28,284.27-11,543.43

Finding the Fourth Proportional to 20,495.78, 28,284.27 and 11,543.43

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Solution

The fourth proportional to 20,495.78, 28,284.27 and 11,543.43 is: 15,929.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,495.78 : 28,284.27 = 11,543.43 : x
  2. Step 2: Convert to fraction form
    20,495.78/28,284.27 = 11,543.43/x
  3. Step 3: Cross multiply
    20,495.78x = 28,284.27 × 11,543.43
  4. Step 4: Simplify right side
    20,495.78x = 326,497,490.85
  5. Step 5: Solve for x
    x = 326,497,490.85/20,495.78
  6. Step 6: Final answer
    x = 15,929.99

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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.