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Finding the Fourth Proportional to 15,611.85, 21,544.89 and 8,898.48

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Solution

The fourth proportional to 15,611.85, 21,544.89 and 8,898.48 is: 12,280.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,611.85 : 21,544.89 = 8,898.48 : x
  2. Step 2: Convert to fraction form
    15,611.85/21,544.89 = 8,898.48/x
  3. Step 3: Cross multiply
    15,611.85x = 21,544.89 × 8,898.48
  4. Step 4: Simplify right side
    15,611.85x = 191,716,772.77
  5. Step 5: Solve for x
    x = 191,716,772.77/15,611.85
  6. Step 6: Final answer
    x = 12,280.21

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1.5x scale

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.