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Finding the Fourth Proportional to 28,980.44, 39,990.80 and 17,648.68

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Solution

The fourth proportional to 28,980.44, 39,990.80 and 17,648.68 is: 24,353.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,980.44 : 39,990.80 = 17,648.68 : x
  2. Step 2: Convert to fraction form
    28,980.44/39,990.80 = 17,648.68/x
  3. Step 3: Cross multiply
    28,980.44x = 39,990.80 × 17,648.68
  4. Step 4: Simplify right side
    28,980.44x = 705,784,832.14
  5. Step 5: Solve for x
    x = 705,784,832.14/28,980.44
  6. Step 6: Final answer
    x = 24,353.83

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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.