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Finding the Fourth Proportional to 8,742.79, 12,064.62 and 4,763.89

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Solution

The fourth proportional to 8,742.79, 12,064.62 and 4,763.89 is: 6,573.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,742.79 : 12,064.62 = 4,763.89 : x
  2. Step 2: Convert to fraction form
    8,742.79/12,064.62 = 4,763.89/x
  3. Step 3: Cross multiply
    8,742.79x = 12,064.62 × 4,763.89
  4. Step 4: Simplify right side
    8,742.79x = 57,474,522.57
  5. Step 5: Solve for x
    x = 57,474,522.57/8,742.79
  6. Step 6: Final answer
    x = 6,573.93

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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.