Home / 21,605.64-29,826-12,650.28

Finding the Fourth Proportional to 21,605.64, 29,826 and 12,650.28

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Solution

The fourth proportional to 21,605.64, 29,826 and 12,650.28 is: 17,463.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,605.64 : 29,826 = 12,650.28 : x
  2. Step 2: Convert to fraction form
    21,605.64/29,826 = 12,650.28/x
  3. Step 3: Cross multiply
    21,605.64x = 29,826 × 12,650.28
  4. Step 4: Simplify right side
    21,605.64x = 377,307,251.28
  5. Step 5: Solve for x
    x = 377,307,251.28/21,605.64
  6. Step 6: Final answer
    x = 17,463.37

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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.