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Finding the Fourth Proportional to 8,905.01, 12,280.73 and 7,645.64

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Solution

The fourth proportional to 8,905.01, 12,280.73 and 7,645.64 is: 10,543.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,905.01 : 12,280.73 = 7,645.64 : x
  2. Step 2: Convert to fraction form
    8,905.01/12,280.73 = 7,645.64/x
  3. Step 3: Cross multiply
    8,905.01x = 12,280.73 × 7,645.64
  4. Step 4: Simplify right side
    8,905.01x = 93,893,940.89
  5. Step 5: Solve for x
    x = 93,893,940.89/8,905.01
  6. Step 6: Final answer
    x = 10,543.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.