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Finding the Fourth Proportional to 15,172.71, 20,926.47 and 9,869.22

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Solution

The fourth proportional to 15,172.71, 20,926.47 and 9,869.22 is: 13,611.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,172.71 : 20,926.47 = 9,869.22 : x
  2. Step 2: Convert to fraction form
    15,172.71/20,926.47 = 9,869.22/x
  3. Step 3: Cross multiply
    15,172.71x = 20,926.47 × 9,869.22
  4. Step 4: Simplify right side
    15,172.71x = 206,527,936.25
  5. Step 5: Solve for x
    x = 206,527,936.25/15,172.71
  6. Step 6: Final answer
    x = 13,611.80

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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.