Home / 28,145.02-38,838.42-15,395.80

Finding the Fourth Proportional to 28,145.02, 38,838.42 and 15,395.80

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Solution

The fourth proportional to 28,145.02, 38,838.42 and 15,395.80 is: 21,245.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,145.02 : 38,838.42 = 15,395.80 : x
  2. Step 2: Convert to fraction form
    28,145.02/38,838.42 = 15,395.80/x
  3. Step 3: Cross multiply
    28,145.02x = 38,838.42 × 15,395.80
  4. Step 4: Simplify right side
    28,145.02x = 597,948,546.64
  5. Step 5: Solve for x
    x = 597,948,546.64/28,145.02
  6. Step 6: Final answer
    x = 21,245.27

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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.