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Finding the Fourth Proportional to 15,881.01, 21,914.19 and 9,168.80

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Solution

The fourth proportional to 15,881.01, 21,914.19 and 9,168.80 is: 12,652.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,881.01 : 21,914.19 = 9,168.80 : x
  2. Step 2: Convert to fraction form
    15,881.01/21,914.19 = 9,168.80/x
  3. Step 3: Cross multiply
    15,881.01x = 21,914.19 × 9,168.80
  4. Step 4: Simplify right side
    15,881.01x = 200,926,715.70
  5. Step 5: Solve for x
    x = 200,926,715.70/15,881.01
  6. Step 6: Final answer
    x = 12,652.01

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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.