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Finding the Fourth Proportional to 28,625.47, 42,942.10 and 9,900.48

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Solution

The fourth proportional to 28,625.47, 42,942.10 and 9,900.48 is: 14,852.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,625.47 : 42,942.10 = 9,900.48 : x
  2. Step 2: Convert to fraction form
    28,625.47/42,942.10 = 9,900.48/x
  3. Step 3: Cross multiply
    28,625.47x = 42,942.10 × 9,900.48
  4. Step 4: Simplify right side
    28,625.47x = 425,147,315.50
  5. Step 5: Solve for x
    x = 425,147,315.50/28,625.47
  6. Step 6: Final answer
    x = 14,852.07

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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.