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Finding the Fourth Proportional to 20,611.71, 30,907.17 and 14,685.21

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Solution

The fourth proportional to 20,611.71, 30,907.17 and 14,685.21 is: 22,020.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,611.71 : 30,907.17 = 14,685.21 : x
  2. Step 2: Convert to fraction form
    20,611.71/30,907.17 = 14,685.21/x
  3. Step 3: Cross multiply
    20,611.71x = 30,907.17 × 14,685.21
  4. Step 4: Simplify right side
    20,611.71x = 453,878,281.96
  5. Step 5: Solve for x
    x = 453,878,281.96/20,611.71
  6. Step 6: Final answer
    x = 22,020.41

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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.