Home / 14,220.88-21,439.62-13,218.64

Finding the Fourth Proportional to 14,220.88, 21,439.62 and 13,218.64

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Solution

The fourth proportional to 14,220.88, 21,439.62 and 13,218.64 is: 19,928.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,220.88 : 21,439.62 = 13,218.64 : x
  2. Step 2: Convert to fraction form
    14,220.88/21,439.62 = 13,218.64/x
  3. Step 3: Cross multiply
    14,220.88x = 21,439.62 × 13,218.64
  4. Step 4: Simplify right side
    14,220.88x = 283,402,618.52
  5. Step 5: Solve for x
    x = 283,402,618.52/14,220.88
  6. Step 6: Final answer
    x = 19,928.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.