Home / 21,278.61-29,363.32-11,716.63

Finding the Fourth Proportional to 21,278.61, 29,363.32 and 11,716.63

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Solution

The fourth proportional to 21,278.61, 29,363.32 and 11,716.63 is: 16,168.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.61 : 29,363.32 = 11,716.63 : x
  2. Step 2: Convert to fraction form
    21,278.61/29,363.32 = 11,716.63/x
  3. Step 3: Cross multiply
    21,278.61x = 29,363.32 × 11,716.63
  4. Step 4: Simplify right side
    21,278.61x = 344,039,156.01
  5. Step 5: Solve for x
    x = 344,039,156.01/21,278.61
  6. Step 6: Final answer
    x = 16,168.31

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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.