Home / 21,253.28-29,329.10-11,821.64

Finding the Fourth Proportional to 21,253.28, 29,329.10 and 11,821.64

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Solution

The fourth proportional to 21,253.28, 29,329.10 and 11,821.64 is: 16,313.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,253.28 : 29,329.10 = 11,821.64 : x
  2. Step 2: Convert to fraction form
    21,253.28/29,329.10 = 11,821.64/x
  3. Step 3: Cross multiply
    21,253.28x = 29,329.10 × 11,821.64
  4. Step 4: Simplify right side
    21,253.28x = 346,718,061.72
  5. Step 5: Solve for x
    x = 346,718,061.72/21,253.28
  6. Step 6: Final answer
    x = 16,313.63

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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.