Home / 13,438.51-18,542.12-8,132.20

Finding the Fourth Proportional to 13,438.51, 18,542.12 and 8,132.20

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Solution

The fourth proportional to 13,438.51, 18,542.12 and 8,132.20 is: 11,220.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,438.51 : 18,542.12 = 8,132.20 : x
  2. Step 2: Convert to fraction form
    13,438.51/18,542.12 = 8,132.20/x
  3. Step 3: Cross multiply
    13,438.51x = 18,542.12 × 8,132.20
  4. Step 4: Simplify right side
    13,438.51x = 150,788,141.25
  5. Step 5: Solve for x
    x = 150,788,141.25/13,438.51
  6. Step 6: Final answer
    x = 11,220.60

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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.