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Finding the Fourth Proportional to 28,428.93, 42,652.83 and 8,707.68

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Solution

The fourth proportional to 28,428.93, 42,652.83 and 8,707.68 is: 13,064.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.93 : 42,652.83 = 8,707.68 : x
  2. Step 2: Convert to fraction form
    28,428.93/42,652.83 = 8,707.68/x
  3. Step 3: Cross multiply
    28,428.93x = 42,652.83 × 8,707.68
  4. Step 4: Simplify right side
    28,428.93x = 371,407,194.73
  5. Step 5: Solve for x
    x = 371,407,194.73/28,428.93
  6. Step 6: Final answer
    x = 13,064.41

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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.