Home / 21,343.68-29,454.54-12,391.56

Finding the Fourth Proportional to 21,343.68, 29,454.54 and 12,391.56

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Solution

The fourth proportional to 21,343.68, 29,454.54 and 12,391.56 is: 17,100.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,343.68 : 29,454.54 = 12,391.56 : x
  2. Step 2: Convert to fraction form
    21,343.68/29,454.54 = 12,391.56/x
  3. Step 3: Cross multiply
    21,343.68x = 29,454.54 × 12,391.56
  4. Step 4: Simplify right side
    21,343.68x = 364,987,699.68
  5. Step 5: Solve for x
    x = 364,987,699.68/21,343.68
  6. Step 6: Final answer
    x = 17,100.50

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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.