Home / 21,816.57-30,106.04-13,332.88

Finding the Fourth Proportional to 21,816.57, 30,106.04 and 13,332.88

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Solution

The fourth proportional to 21,816.57, 30,106.04 and 13,332.88 is: 18,398.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,816.57 : 30,106.04 = 13,332.88 : x
  2. Step 2: Convert to fraction form
    21,816.57/30,106.04 = 13,332.88/x
  3. Step 3: Cross multiply
    21,816.57x = 30,106.04 × 13,332.88
  4. Step 4: Simplify right side
    21,816.57x = 401,400,218.60
  5. Step 5: Solve for x
    x = 401,400,218.60/21,816.57
  6. Step 6: Final answer
    x = 18,398.87

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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.