Home / 13,489.14-18,615.02-7,520.68

Finding the Fourth Proportional to 13,489.14, 18,615.02 and 7,520.68

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Solution

The fourth proportional to 13,489.14, 18,615.02 and 7,520.68 is: 10,378.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,489.14 : 18,615.02 = 7,520.68 : x
  2. Step 2: Convert to fraction form
    13,489.14/18,615.02 = 7,520.68/x
  3. Step 3: Cross multiply
    13,489.14x = 18,615.02 × 7,520.68
  4. Step 4: Simplify right side
    13,489.14x = 139,997,608.61
  5. Step 5: Solve for x
    x = 139,997,608.61/13,489.14
  6. Step 6: Final answer
    x = 10,378.54

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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.