Home / 21,865.80-30,144-18,494.99

Finding the Fourth Proportional to 21,865.80, 30,144 and 18,494.99

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Solution

The fourth proportional to 21,865.80, 30,144 and 18,494.99 is: 25,497.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,865.80 : 30,144 = 18,494.99 : x
  2. Step 2: Convert to fraction form
    21,865.80/30,144 = 18,494.99/x
  3. Step 3: Cross multiply
    21,865.80x = 30,144 × 18,494.99
  4. Step 4: Simplify right side
    21,865.80x = 557,512,827.84
  5. Step 5: Solve for x
    x = 557,512,827.84/21,865.80
  6. Step 6: Final answer
    x = 25,497.02

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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.