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Finding the Fourth Proportional to 8,487.02, 12,728.10 and 2,938.93

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Solution

The fourth proportional to 8,487.02, 12,728.10 and 2,938.93 is: 4,407.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,487.02 : 12,728.10 = 2,938.93 : x
  2. Step 2: Convert to fraction form
    8,487.02/12,728.10 = 2,938.93/x
  3. Step 3: Cross multiply
    8,487.02x = 12,728.10 × 2,938.93
  4. Step 4: Simplify right side
    8,487.02x = 37,406,994.93
  5. Step 5: Solve for x
    x = 37,406,994.93/8,487.02
  6. Step 6: Final answer
    x = 4,407.55

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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.