Home / 13,620.14-18,788.73-9,145.45

Finding the Fourth Proportional to 13,620.14, 18,788.73 and 9,145.45

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Solution

The fourth proportional to 13,620.14, 18,788.73 and 9,145.45 is: 12,615.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.14 : 18,788.73 = 9,145.45 : x
  2. Step 2: Convert to fraction form
    13,620.14/18,788.73 = 9,145.45/x
  3. Step 3: Cross multiply
    13,620.14x = 18,788.73 × 9,145.45
  4. Step 4: Simplify right side
    13,620.14x = 171,831,390.78
  5. Step 5: Solve for x
    x = 171,831,390.78/13,620.14
  6. Step 6: Final answer
    x = 12,615.98

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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.