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Finding the Fourth Proportional to 20,615.66, 30,923.50 and 7,298.43

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Solution

The fourth proportional to 20,615.66, 30,923.50 and 7,298.43 is: 10,947.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.66 : 30,923.50 = 7,298.43 : x
  2. Step 2: Convert to fraction form
    20,615.66/30,923.50 = 7,298.43/x
  3. Step 3: Cross multiply
    20,615.66x = 30,923.50 × 7,298.43
  4. Step 4: Simplify right side
    20,615.66x = 225,692,946.03
  5. Step 5: Solve for x
    x = 225,692,946.03/20,615.66
  6. Step 6: Final answer
    x = 10,947.64

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Similar ratio
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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.