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Finding the Fourth Proportional to 8,859.57, 13,289.28 and 2,620

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Solution

The fourth proportional to 8,859.57, 13,289.28 and 2,620 is: 3,929.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,859.57 : 13,289.28 = 2,620 : x
  2. Step 2: Convert to fraction form
    8,859.57/13,289.28 = 2,620/x
  3. Step 3: Cross multiply
    8,859.57x = 13,289.28 × 2,620
  4. Step 4: Simplify right side
    8,859.57x = 34,817,913.60
  5. Step 5: Solve for x
    x = 34,817,913.60/8,859.57
  6. Step 6: Final answer
    x = 3,929.98

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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.