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Finding the Fourth Proportional to 28,080.64, 38,735.04 and 18,144.64

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Solution

The fourth proportional to 28,080.64, 38,735.04 and 18,144.64 is: 25,029.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,080.64 : 38,735.04 = 18,144.64 : x
  2. Step 2: Convert to fraction form
    28,080.64/38,735.04 = 18,144.64/x
  3. Step 3: Cross multiply
    28,080.64x = 38,735.04 × 18,144.64
  4. Step 4: Simplify right side
    28,080.64x = 702,833,356.19
  5. Step 5: Solve for x
    x = 702,833,356.19/28,080.64
  6. Step 6: Final answer
    x = 25,029.11

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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.