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Finding the Fourth Proportional to 9,124.79, 13,687.79 and 2,885.06

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Solution

The fourth proportional to 9,124.79, 13,687.79 and 2,885.06 is: 4,327.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,124.79 : 13,687.79 = 2,885.06 : x
  2. Step 2: Convert to fraction form
    9,124.79/13,687.79 = 2,885.06/x
  3. Step 3: Cross multiply
    9,124.79x = 13,687.79 × 2,885.06
  4. Step 4: Simplify right side
    9,124.79x = 39,490,012.55
  5. Step 5: Solve for x
    x = 39,490,012.55/9,124.79
  6. Step 6: Final answer
    x = 4,327.77

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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.