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Finding the Fourth Proportional to 28,513.62, 42,772.59 and 7,738.74

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Solution

The fourth proportional to 28,513.62, 42,772.59 and 7,738.74 is: 11,608.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,513.62 : 42,772.59 = 7,738.74 : x
  2. Step 2: Convert to fraction form
    28,513.62/42,772.59 = 7,738.74/x
  3. Step 3: Cross multiply
    28,513.62x = 42,772.59 × 7,738.74
  4. Step 4: Simplify right side
    28,513.62x = 331,005,953.14
  5. Step 5: Solve for x
    x = 331,005,953.14/28,513.62
  6. Step 6: Final answer
    x = 11,608.70

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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.