Home / 21,226.64-29,294.49-13,688.66

Finding the Fourth Proportional to 21,226.64, 29,294.49 and 13,688.66

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Solution

The fourth proportional to 21,226.64, 29,294.49 and 13,688.66 is: 18,891.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,226.64 : 29,294.49 = 13,688.66 : x
  2. Step 2: Convert to fraction form
    21,226.64/29,294.49 = 13,688.66/x
  3. Step 3: Cross multiply
    21,226.64x = 29,294.49 × 13,688.66
  4. Step 4: Simplify right side
    21,226.64x = 401,002,313.48
  5. Step 5: Solve for x
    x = 401,002,313.48/21,226.64
  6. Step 6: Final answer
    x = 18,891.46

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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.