Home / 21,267.78-29,352.36-12,318.09

Finding the Fourth Proportional to 21,267.78, 29,352.36 and 12,318.09

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Solution

The fourth proportional to 21,267.78, 29,352.36 and 12,318.09 is: 17,000.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,267.78 : 29,352.36 = 12,318.09 : x
  2. Step 2: Convert to fraction form
    21,267.78/29,352.36 = 12,318.09/x
  3. Step 3: Cross multiply
    21,267.78x = 29,352.36 × 12,318.09
  4. Step 4: Simplify right side
    21,267.78x = 361,565,012.19
  5. Step 5: Solve for x
    x = 361,565,012.19/21,267.78
  6. Step 6: Final answer
    x = 17,000.60

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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.