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Finding the Fourth Proportional to 28,325, 39,089.40 and 15,750.56

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Solution

The fourth proportional to 28,325, 39,089.40 and 15,750.56 is: 21,736.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,325 : 39,089.40 = 15,750.56 : x
  2. Step 2: Convert to fraction form
    28,325/39,089.40 = 15,750.56/x
  3. Step 3: Cross multiply
    28,325x = 39,089.40 × 15,750.56
  4. Step 4: Simplify right side
    28,325x = 615,679,940.06
  5. Step 5: Solve for x
    x = 615,679,940.06/28,325
  6. Step 6: Final answer
    x = 21,736.27

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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.