Home / 21,871.32-30,158.58-14,785.44

Finding the Fourth Proportional to 21,871.32, 30,158.58 and 14,785.44

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Solution

The fourth proportional to 21,871.32, 30,158.58 and 14,785.44 is: 20,387.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,871.32 : 30,158.58 = 14,785.44 : x
  2. Step 2: Convert to fraction form
    21,871.32/30,158.58 = 14,785.44/x
  3. Step 3: Cross multiply
    21,871.32x = 30,158.58 × 14,785.44
  4. Step 4: Simplify right side
    21,871.32x = 445,907,734.26
  5. Step 5: Solve for x
    x = 445,907,734.26/21,871.32
  6. Step 6: Final answer
    x = 20,387.79

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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.