Home / 21,913.21-30,237.81-13,417.47

Finding the Fourth Proportional to 21,913.21, 30,237.81 and 13,417.47

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Solution

The fourth proportional to 21,913.21, 30,237.81 and 13,417.47 is: 18,514.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,913.21 : 30,237.81 = 13,417.47 : x
  2. Step 2: Convert to fraction form
    21,913.21/30,237.81 = 13,417.47/x
  3. Step 3: Cross multiply
    21,913.21x = 30,237.81 × 13,417.47
  4. Step 4: Simplify right side
    21,913.21x = 405,714,908.54
  5. Step 5: Solve for x
    x = 405,714,908.54/21,913.21
  6. Step 6: Final answer
    x = 18,514.63

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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.