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Finding the Fourth Proportional to 28,551.25, 42,802.25 and 13,739.80

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Solution

The fourth proportional to 28,551.25, 42,802.25 and 13,739.80 is: 20,597.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,551.25 : 42,802.25 = 13,739.80 : x
  2. Step 2: Convert to fraction form
    28,551.25/42,802.25 = 13,739.80/x
  3. Step 3: Cross multiply
    28,551.25x = 42,802.25 × 13,739.80
  4. Step 4: Simplify right side
    28,551.25x = 588,094,174.89
  5. Step 5: Solve for x
    x = 588,094,174.89/28,551.25
  6. Step 6: Final answer
    x = 20,597.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.