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Finding the Fourth Proportional to 28,029.60, 42,028.20 and 10,501.20

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Solution

The fourth proportional to 28,029.60, 42,028.20 and 10,501.20 is: 15,745.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,029.60 : 42,028.20 = 10,501.20 : x
  2. Step 2: Convert to fraction form
    28,029.60/42,028.20 = 10,501.20/x
  3. Step 3: Cross multiply
    28,029.60x = 42,028.20 × 10,501.20
  4. Step 4: Simplify right side
    28,029.60x = 441,346,533.84
  5. Step 5: Solve for x
    x = 441,346,533.84/28,029.60
  6. Step 6: Final answer
    x = 15,745.73

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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.