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Finding the Fourth Proportional to 30,439.72, 45,659.08 and 11,723.86

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Solution

The fourth proportional to 30,439.72, 45,659.08 and 11,723.86 is: 17,585.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,439.72 : 45,659.08 = 11,723.86 : x
  2. Step 2: Convert to fraction form
    30,439.72/45,659.08 = 11,723.86/x
  3. Step 3: Cross multiply
    30,439.72x = 45,659.08 × 11,723.86
  4. Step 4: Simplify right side
    30,439.72x = 535,300,661.65
  5. Step 5: Solve for x
    x = 535,300,661.65/30,439.72
  6. Step 6: Final answer
    x = 17,585.60

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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.