Home / 28,400.78-39,188.46-16,461.78

Finding the Fourth Proportional to 28,400.78, 39,188.46 and 16,461.78

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Solution

The fourth proportional to 28,400.78, 39,188.46 and 16,461.78 is: 22,714.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,400.78 : 39,188.46 = 16,461.78 : x
  2. Step 2: Convert to fraction form
    28,400.78/39,188.46 = 16,461.78/x
  3. Step 3: Cross multiply
    28,400.78x = 39,188.46 × 16,461.78
  4. Step 4: Simplify right side
    28,400.78x = 645,111,849.67
  5. Step 5: Solve for x
    x = 645,111,849.67/28,400.78
  6. Step 6: Final answer
    x = 22,714.58

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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.