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Finding the Fourth Proportional to 14,000.87, 20,981.55 and 7,763.66

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Solution

The fourth proportional to 14,000.87, 20,981.55 and 7,763.66 is: 11,634.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,000.87 : 20,981.55 = 7,763.66 : x
  2. Step 2: Convert to fraction form
    14,000.87/20,981.55 = 7,763.66/x
  3. Step 3: Cross multiply
    14,000.87x = 20,981.55 × 7,763.66
  4. Step 4: Simplify right side
    14,000.87x = 162,893,620.47
  5. Step 5: Solve for x
    x = 162,893,620.47/14,000.87
  6. Step 6: Final answer
    x = 11,634.54

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1.5x scale

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.