Home / 21,337.78-29,447.80-11,907.76

Finding the Fourth Proportional to 21,337.78, 29,447.80 and 11,907.76

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Solution

The fourth proportional to 21,337.78, 29,447.80 and 11,907.76 is: 16,433.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,337.78 : 29,447.80 = 11,907.76 : x
  2. Step 2: Convert to fraction form
    21,337.78/29,447.80 = 11,907.76/x
  3. Step 3: Cross multiply
    21,337.78x = 29,447.80 × 11,907.76
  4. Step 4: Simplify right side
    21,337.78x = 350,657,334.93
  5. Step 5: Solve for x
    x = 350,657,334.93/21,337.78
  6. Step 6: Final answer
    x = 16,433.64

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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.