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Finding the Fourth Proportional to 20,343.60, 30,491.10 and 10,477.80

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Solution

The fourth proportional to 20,343.60, 30,491.10 and 10,477.80 is: 15,704.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,343.60 : 30,491.10 = 10,477.80 : x
  2. Step 2: Convert to fraction form
    20,343.60/30,491.10 = 10,477.80/x
  3. Step 3: Cross multiply
    20,343.60x = 30,491.10 × 10,477.80
  4. Step 4: Simplify right side
    20,343.60x = 319,479,647.58
  5. Step 5: Solve for x
    x = 319,479,647.58/20,343.60
  6. Step 6: Final answer
    x = 15,704.18

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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.