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Finding the Fourth Proportional to 20,425.81, 30,623.15 and 10,558.79

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Solution

The fourth proportional to 20,425.81, 30,623.15 and 10,558.79 is: 15,830.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,425.81 : 30,623.15 = 10,558.79 : x
  2. Step 2: Convert to fraction form
    20,425.81/30,623.15 = 10,558.79/x
  3. Step 3: Cross multiply
    20,425.81x = 30,623.15 × 10,558.79
  4. Step 4: Simplify right side
    20,425.81x = 323,343,409.99
  5. Step 5: Solve for x
    x = 323,343,409.99/20,425.81
  6. Step 6: Final answer
    x = 15,830.14

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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.