Home / 21,898.27-30,218.02-13,401.78

Finding the Fourth Proportional to 21,898.27, 30,218.02 and 13,401.78

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Solution

The fourth proportional to 21,898.27, 30,218.02 and 13,401.78 is: 18,493.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,898.27 : 30,218.02 = 13,401.78 : x
  2. Step 2: Convert to fraction form
    21,898.27/30,218.02 = 13,401.78/x
  3. Step 3: Cross multiply
    21,898.27x = 30,218.02 × 13,401.78
  4. Step 4: Simplify right side
    21,898.27x = 404,975,256.08
  5. Step 5: Solve for x
    x = 404,975,256.08/21,898.27
  6. Step 6: Final answer
    x = 18,493.48

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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.