Home / 21,025.12-28,988.04-13,853.92

Finding the Fourth Proportional to 21,025.12, 28,988.04 and 13,853.92

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Solution

The fourth proportional to 21,025.12, 28,988.04 and 13,853.92 is: 19,100.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,025.12 : 28,988.04 = 13,853.92 : x
  2. Step 2: Convert to fraction form
    21,025.12/28,988.04 = 13,853.92/x
  3. Step 3: Cross multiply
    21,025.12x = 28,988.04 × 13,853.92
  4. Step 4: Simplify right side
    21,025.12x = 401,597,987.12
  5. Step 5: Solve for x
    x = 401,597,987.12/21,025.12
  6. Step 6: Final answer
    x = 19,100.87

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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.