Home / 21,078.47-29,078.35-12,575.73

Finding the Fourth Proportional to 21,078.47, 29,078.35 and 12,575.73

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Solution

The fourth proportional to 21,078.47, 29,078.35 and 12,575.73 is: 17,348.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,078.47 : 29,078.35 = 12,575.73 : x
  2. Step 2: Convert to fraction form
    21,078.47/29,078.35 = 12,575.73/x
  3. Step 3: Cross multiply
    21,078.47x = 29,078.35 × 12,575.73
  4. Step 4: Simplify right side
    21,078.47x = 365,681,447.01
  5. Step 5: Solve for x
    x = 365,681,447.01/21,078.47
  6. Step 6: Final answer
    x = 17,348.57

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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.