Home / 13,615.02-20,380.14-8,688.60

Finding the Fourth Proportional to 13,615.02, 20,380.14 and 8,688.60

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Solution

The fourth proportional to 13,615.02, 20,380.14 and 8,688.60 is: 13,005.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,615.02 : 20,380.14 = 8,688.60 : x
  2. Step 2: Convert to fraction form
    13,615.02/20,380.14 = 8,688.60/x
  3. Step 3: Cross multiply
    13,615.02x = 20,380.14 × 8,688.60
  4. Step 4: Simplify right side
    13,615.02x = 177,074,884.40
  5. Step 5: Solve for x
    x = 177,074,884.40/13,615.02
  6. Step 6: Final answer
    x = 13,005.85

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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.