Home / 13,520.56-18,666.60-12,683.92

Finding the Fourth Proportional to 13,520.56, 18,666.60 and 12,683.92

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Solution

The fourth proportional to 13,520.56, 18,666.60 and 12,683.92 is: 17,511.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,520.56 : 18,666.60 = 12,683.92 : x
  2. Step 2: Convert to fraction form
    13,520.56/18,666.60 = 12,683.92/x
  3. Step 3: Cross multiply
    13,520.56x = 18,666.60 × 12,683.92
  4. Step 4: Simplify right side
    13,520.56x = 236,765,661.07
  5. Step 5: Solve for x
    x = 236,765,661.07/13,520.56
  6. Step 6: Final answer
    x = 17,511.53

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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.