Home / 21,780.29-30,067.36-14,607.58

Finding the Fourth Proportional to 21,780.29, 30,067.36 and 14,607.58

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Solution

The fourth proportional to 21,780.29, 30,067.36 and 14,607.58 is: 20,165.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,780.29 : 30,067.36 = 14,607.58 : x
  2. Step 2: Convert to fraction form
    21,780.29/30,067.36 = 14,607.58/x
  3. Step 3: Cross multiply
    21,780.29x = 30,067.36 × 14,607.58
  4. Step 4: Simplify right side
    21,780.29x = 439,211,293.55
  5. Step 5: Solve for x
    x = 439,211,293.55/21,780.29
  6. Step 6: Final answer
    x = 20,165.54

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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.