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Finding the Fourth Proportional to 13,412.94, 18,509.31 and 7,444.86

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Solution

The fourth proportional to 13,412.94, 18,509.31 and 7,444.86 is: 10,273.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,412.94 : 18,509.31 = 7,444.86 : x
  2. Step 2: Convert to fraction form
    13,412.94/18,509.31 = 7,444.86/x
  3. Step 3: Cross multiply
    13,412.94x = 18,509.31 × 7,444.86
  4. Step 4: Simplify right side
    13,412.94x = 137,799,221.65
  5. Step 5: Solve for x
    x = 137,799,221.65/13,412.94
  6. Step 6: Final answer
    x = 10,273.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.