Home / 12,865.20-19,276.20-11,007.60

Finding the Fourth Proportional to 12,865.20, 19,276.20 and 11,007.60

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Solution

The fourth proportional to 12,865.20, 19,276.20 and 11,007.60 is: 16,492.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,865.20 : 19,276.20 = 11,007.60 : x
  2. Step 2: Convert to fraction form
    12,865.20/19,276.20 = 11,007.60/x
  3. Step 3: Cross multiply
    12,865.20x = 19,276.20 × 11,007.60
  4. Step 4: Simplify right side
    12,865.20x = 212,184,699.12
  5. Step 5: Solve for x
    x = 212,184,699.12/12,865.20
  6. Step 6: Final answer
    x = 16,492.92

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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.