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Finding the Fourth Proportional to 20,505.72, 30,762.69 and 7,359.12

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Solution

The fourth proportional to 20,505.72, 30,762.69 and 7,359.12 is: 11,040.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,505.72 : 30,762.69 = 7,359.12 : x
  2. Step 2: Convert to fraction form
    20,505.72/30,762.69 = 7,359.12/x
  3. Step 3: Cross multiply
    20,505.72x = 30,762.69 × 7,359.12
  4. Step 4: Simplify right side
    20,505.72x = 226,386,327.23
  5. Step 5: Solve for x
    x = 226,386,327.23/20,505.72
  6. Step 6: Final answer
    x = 11,040.16

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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.