Home / 12,720.32-19,078.24-3,483.84

Finding the Fourth Proportional to 12,720.32, 19,078.24 and 3,483.84

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Solution

The fourth proportional to 12,720.32, 19,078.24 and 3,483.84 is: 5,225.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.32 : 19,078.24 = 3,483.84 : x
  2. Step 2: Convert to fraction form
    12,720.32/19,078.24 = 3,483.84/x
  3. Step 3: Cross multiply
    12,720.32x = 19,078.24 × 3,483.84
  4. Step 4: Simplify right side
    12,720.32x = 66,465,535.64
  5. Step 5: Solve for x
    x = 66,465,535.64/12,720.32
  6. Step 6: Final answer
    x = 5,225.15

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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.