Home / 28,080.72-38,750.04-15,505.20

Finding the Fourth Proportional to 28,080.72, 38,750.04 and 15,505.20

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Solution

The fourth proportional to 28,080.72, 38,750.04 and 15,505.20 is: 21,396.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,080.72 : 38,750.04 = 15,505.20 : x
  2. Step 2: Convert to fraction form
    28,080.72/38,750.04 = 15,505.20/x
  3. Step 3: Cross multiply
    28,080.72x = 38,750.04 × 15,505.20
  4. Step 4: Simplify right side
    28,080.72x = 600,827,120.21
  5. Step 5: Solve for x
    x = 600,827,120.21/28,080.72
  6. Step 6: Final answer
    x = 21,396.43

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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.