Home / 13,989.72-21,004.02-8,144.76

Finding the Fourth Proportional to 13,989.72, 21,004.02 and 8,144.76

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Solution

The fourth proportional to 13,989.72, 21,004.02 and 8,144.76 is: 12,228.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,989.72 : 21,004.02 = 8,144.76 : x
  2. Step 2: Convert to fraction form
    13,989.72/21,004.02 = 8,144.76/x
  3. Step 3: Cross multiply
    13,989.72x = 21,004.02 × 8,144.76
  4. Step 4: Simplify right side
    13,989.72x = 171,072,701.94
  5. Step 5: Solve for x
    x = 171,072,701.94/13,989.72
  6. Step 6: Final answer
    x = 12,228.46

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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.