Home / 21,216.33-29,278.53-11,784.69

Finding the Fourth Proportional to 21,216.33, 29,278.53 and 11,784.69

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Solution

The fourth proportional to 21,216.33, 29,278.53 and 11,784.69 is: 16,262.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,216.33 : 29,278.53 = 11,784.69 : x
  2. Step 2: Convert to fraction form
    21,216.33/29,278.53 = 11,784.69/x
  3. Step 3: Cross multiply
    21,216.33x = 29,278.53 × 11,784.69
  4. Step 4: Simplify right side
    21,216.33x = 345,038,399.71
  5. Step 5: Solve for x
    x = 345,038,399.71/21,216.33
  6. Step 6: Final answer
    x = 16,262.87

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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.