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Finding the Fourth Proportional to 13,608.37, 20,424.87 and 7,039.18

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Solution

The fourth proportional to 13,608.37, 20,424.87 and 7,039.18 is: 10,565.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608.37 : 20,424.87 = 7,039.18 : x
  2. Step 2: Convert to fraction form
    13,608.37/20,424.87 = 7,039.18/x
  3. Step 3: Cross multiply
    13,608.37x = 20,424.87 × 7,039.18
  4. Step 4: Simplify right side
    13,608.37x = 143,774,336.41
  5. Step 5: Solve for x
    x = 143,774,336.41/13,608.37
  6. Step 6: Final answer
    x = 10,565.14

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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.