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Finding the Fourth Proportional to 20,484.60, 30,683.70 and 18,295.80

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Solution

The fourth proportional to 20,484.60, 30,683.70 and 18,295.80 is: 27,405.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,484.60 : 30,683.70 = 18,295.80 : x
  2. Step 2: Convert to fraction form
    20,484.60/30,683.70 = 18,295.80/x
  3. Step 3: Cross multiply
    20,484.60x = 30,683.70 × 18,295.80
  4. Step 4: Simplify right side
    20,484.60x = 561,382,838.46
  5. Step 5: Solve for x
    x = 561,382,838.46/20,484.60
  6. Step 6: Final answer
    x = 27,405.12

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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.