Home / 13,580.52-20,369.79-4,220.28

Finding the Fourth Proportional to 13,580.52, 20,369.79 and 4,220.28

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Solution

The fourth proportional to 13,580.52, 20,369.79 and 4,220.28 is: 6,330.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,580.52 : 20,369.79 = 4,220.28 : x
  2. Step 2: Convert to fraction form
    13,580.52/20,369.79 = 4,220.28/x
  3. Step 3: Cross multiply
    13,580.52x = 20,369.79 × 4,220.28
  4. Step 4: Simplify right side
    13,580.52x = 85,966,217.34
  5. Step 5: Solve for x
    x = 85,966,217.34/13,580.52
  6. Step 6: Final answer
    x = 6,330.11

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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.