Home / 21,709.89-29,960.28-12,278.25

Finding the Fourth Proportional to 21,709.89, 29,960.28 and 12,278.25

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Solution

The fourth proportional to 21,709.89, 29,960.28 and 12,278.25 is: 16,944.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,709.89 : 29,960.28 = 12,278.25 : x
  2. Step 2: Convert to fraction form
    21,709.89/29,960.28 = 12,278.25/x
  3. Step 3: Cross multiply
    21,709.89x = 29,960.28 × 12,278.25
  4. Step 4: Simplify right side
    21,709.89x = 367,859,807.91
  5. Step 5: Solve for x
    x = 367,859,807.91/21,709.89
  6. Step 6: Final answer
    x = 16,944.34

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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.