Home / 28,639.86-39,514.04-16,538.78

Finding the Fourth Proportional to 28,639.86, 39,514.04 and 16,538.78

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Solution

The fourth proportional to 28,639.86, 39,514.04 and 16,538.78 is: 22,818.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,639.86 : 39,514.04 = 16,538.78 : x
  2. Step 2: Convert to fraction form
    28,639.86/39,514.04 = 16,538.78/x
  3. Step 3: Cross multiply
    28,639.86x = 39,514.04 × 16,538.78
  4. Step 4: Simplify right side
    28,639.86x = 653,514,014.47
  5. Step 5: Solve for x
    x = 653,514,014.47/28,639.86
  6. Step 6: Final answer
    x = 22,818.34

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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.