Home / 21,218.64-29,282.76-11,787

Finding the Fourth Proportional to 21,218.64, 29,282.76 and 11,787

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Solution

The fourth proportional to 21,218.64, 29,282.76 and 11,787 is: 16,266.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.64 : 29,282.76 = 11,787 : x
  2. Step 2: Convert to fraction form
    21,218.64/29,282.76 = 11,787/x
  3. Step 3: Cross multiply
    21,218.64x = 29,282.76 × 11,787
  4. Step 4: Simplify right side
    21,218.64x = 345,155,892.12
  5. Step 5: Solve for x
    x = 345,155,892.12/21,218.64
  6. Step 6: Final answer
    x = 16,266.64

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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.