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Finding the Fourth Proportional to 8,990.61, 12,407.07 and 4,902.38

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Solution

The fourth proportional to 8,990.61, 12,407.07 and 4,902.38 is: 6,765.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990.61 : 12,407.07 = 4,902.38 : x
  2. Step 2: Convert to fraction form
    8,990.61/12,407.07 = 4,902.38/x
  3. Step 3: Cross multiply
    8,990.61x = 12,407.07 × 4,902.38
  4. Step 4: Simplify right side
    8,990.61x = 60,824,214.93
  5. Step 5: Solve for x
    x = 60,824,214.93/8,990.61
  6. Step 6: Final answer
    x = 6,765.30

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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.