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Finding the Fourth Proportional to 36,457.12, 54,708.72 and 20,905.12

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Solution

The fourth proportional to 36,457.12, 54,708.72 and 20,905.12 is: 31,370.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,457.12 : 54,708.72 = 20,905.12 : x
  2. Step 2: Convert to fraction form
    36,457.12/54,708.72 = 20,905.12/x
  3. Step 3: Cross multiply
    36,457.12x = 54,708.72 × 20,905.12
  4. Step 4: Simplify right side
    36,457.12x = 1,143,692,356.65
  5. Step 5: Solve for x
    x = 1,143,692,356.65/36,457.12
  6. Step 6: Final answer
    x = 31,370.89

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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.