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Finding the Fourth Proportional to 28,625.68, 42,942.45 and 9,900.70

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Solution

The fourth proportional to 28,625.68, 42,942.45 and 9,900.70 is: 14,852.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,625.68 : 42,942.45 = 9,900.70 : x
  2. Step 2: Convert to fraction form
    28,625.68/42,942.45 = 9,900.70/x
  3. Step 3: Cross multiply
    28,625.68x = 42,942.45 × 9,900.70
  4. Step 4: Simplify right side
    28,625.68x = 425,160,314.72
  5. Step 5: Solve for x
    x = 425,160,314.72/28,625.68
  6. Step 6: Final answer
    x = 14,852.41

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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.