Home / 13,801.24-20,688.36-5,478.49

Finding the Fourth Proportional to 13,801.24, 20,688.36 and 5,478.49

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Solution

The fourth proportional to 13,801.24, 20,688.36 and 5,478.49 is: 8,212.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,801.24 : 20,688.36 = 5,478.49 : x
  2. Step 2: Convert to fraction form
    13,801.24/20,688.36 = 5,478.49/x
  3. Step 3: Cross multiply
    13,801.24x = 20,688.36 × 5,478.49
  4. Step 4: Simplify right side
    13,801.24x = 113,340,973.38
  5. Step 5: Solve for x
    x = 113,340,973.38/13,801.24
  6. Step 6: Final answer
    x = 8,212.38

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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.