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Finding the Fourth Proportional to 20,159.81, 30,239.72 and 10,984.13

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Solution

The fourth proportional to 20,159.81, 30,239.72 and 10,984.13 is: 16,476.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,159.81 : 30,239.72 = 10,984.13 : x
  2. Step 2: Convert to fraction form
    20,159.81/30,239.72 = 10,984.13/x
  3. Step 3: Cross multiply
    20,159.81x = 30,239.72 × 10,984.13
  4. Step 4: Simplify right side
    20,159.81x = 332,157,015.64
  5. Step 5: Solve for x
    x = 332,157,015.64/20,159.81
  6. Step 6: Final answer
    x = 16,476.20

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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.